Tksheet

Fixed:
- Bug with setting header height when header is set to `int`
- Bug with clicking top left rectangle bars to reset header height / index width
- Wrong colors showing when having rows and columns selected at the same time
- Wrong colors showing for particular selection scenarios
- Control select enabled when using `enable_bindings("all")` when it should only be enabled if using `enable_bindings("ctrl_select")`
- When control select was disabled holding control/command would disable basic sheet bindings

Added:
- Add additional binding for `sheet.bind_event()`. `"<<SheetModified>>"` and `"<<SheetRedrawn>>"` are the two existing event options but currently only an empty dict is the associated data

Fixed:
- `disable_bindings()` disable all bindings not disabling edit header/index capability
- Undo not recreating all former selection boxes with cell edits
- Undoing paste where sheet was expanded and rows were hidden didn't remove added rows
- Bug with hidden rows and index highlights
- Bug with hidden rows and text editor newline binding in main table
- Bug with hidden rows and drag and drop rows
- Issue where columns/rows that where selected already would not open dropdown boxes or toggle checkboxes

Removed:
- External function `edit_cell()`, use `open_cell()` and `set_currently_selected()` as alternative

Added:
- Control / Command selecting multiple non-consecutive boxes
- Functions `checkbox_cell`, `checkbox_row`, `checkbox_column`, `checkbox_sheet`, `dropdown_cell`, `dropdown_row`, `dropdown_column`, `dropdown_sheet` and their related deletion functions

Changed:
- `extra_bindings()` undo event type `"insert_row"` renamed `"insert_rows"`, `"insert_col"` renamed `"insert_cols"`
- `extra_bindings()` undo event `.storeddata` has changed for row/column drag drop undo events to `("move_cols" or "move_rows", original_indexes, new_indexes)`
- Initialization argument `max_rh` renamed `max_row_height`
- Initialization argument `max_colwidth` renamed `max_column_width`
- Initialization argument `max_row_width` renamed `max_index_width`
- `header_dropdown_functions`/`index_dropdown_functions`/`dropdown_functions` now return dict
- Rename internal function `create_text_editor()`
- Select all now maintains existing currently selected cell when using Control/Command - a
- Renamed internal functions `check_views()` `check_xview()` `check_yview()`
- Default argument `redraw` changed to `True` for dropdown/checkbox creation functions
- Internal function `open_text_editor()` keyword argument `set_data_on_close` defaulted to `True`
- Merge internal functions `edit_cell_()` and `open_text_editor()`, remove function `edit_cell_()`
- Better graphical indicators for which columns/rows are being moved when dragging and dropping
- Better retainment of selection boxes after undo cell edits

Fixed:
- Right click delete rows bug [PR171](https://github.com/ragardner/tksheet/pull/171)

Fixed:
- Data getting with `get_displayed = True` not returning checkbox text and also in the main table dropdown box text
- None being displayed on table instead of empty string
- `insert_columns()`/`insert_rows()` with hidden columns/rows not working quite right

Added:
- Hidden rows capability use `display_rows()`/`hide_rows()` and read the documentation for more info

Changed:
- `hide_rows()`/`hide_columns()` `refresh` arg changed to `redraw`
- `hide_rows()`/`hide_columns()` now uses displayed indexes not data

Fixed:
- Undo added to stack when no changes made with cut, paste, delete
- Using generator with `set_column_widths()`/`set_row_heights()` would result in lost first width/height
- Header/Index dropdown `modified_function` not sending modified event
- Escape out of dropdown box doesn't reset arrow orientation

Added:
- Cell formatters, thanks to [PR158](https://github.com/ragardner/tksheet/pull/158)
- `format_cell()`, `format_row()`, `format_column()`, `format_sheet()`
- Options for changing output to clipboard delimiter, quotechar, lineterminator and option for setting paste delimiter detection
- Bindings `"up" "down" "left" "right" "prior" "next"` to enable arrowkey bindings individually use with `enable_bindings()`/`disable_bindings()`
= Dropdowns now have a search feature which searches their values after the entry box is modified (if dropdown is state `normal`)
- Dropdown kwargs `search_function`, `validate_input` and `text`

Removed:
- Startup arg `ctrl_keys_over_dropdowns_enabled`, also removed in `set_options()`
- `set_copy` arg in `set_cell_data()`
- `return_copy` arg in data getting functions but will not generate error if used as keyword arg

Changed:
- `index_border_fg` and `header_border_fg` no longer work, they now use the relevant grid foreground options
- `"dark"`/`"black"` themes
- Dropdowns now default to state `"normal"` and validate input by default
- `set_dropdown_values()`/`set_index_dropdown_values()`/`set_header_dropdown_values()` keyword argument `displayed` changed to `set_value` for clarity
- Checkbox click extra binding and edit cell extra binding (when associated with a checkbox click) return `bool` now, not `str`
- `get_cell_data()`/`get_row_data()`/`get_column_data()` have had an overhaul and have different keyword arguments, see documentation for more information. They also now return empty string/s if index is out of bounds (instead of `None`s)
- Rename some internal functions for consistency
- Extra bindings delete key now returns dict instead of list for boxes

Fixed:
- [159](https://github.com/ragardner/tksheet/issues/159)

Changed:
- `"dark"` theme now looks more appropriate for MacOS dark theme