Webscrapbook

* Hash part of source URL is now considered when viewing an item.
* Fixed an issue that URL hash is not included in the source URL for the captured item.
* Fixed several issues on handling an item whose index file is an archive.

* Added support of more modes for `Form status` capture option.
* Added a default option for the backend server URL option.
* Added support of enabling/disabling undo feature from its context menu.
* Added support of `Home` and `End` for sidebar key navigation.
* Added a message for a scrapbook configured as `no_tree` in the sidebar.
* Added support of `limit:` command for search.
* Fixed an issue that certain interactive properties, such as form status, canvas, and shadow DOM, are lost after an unerase in a re-loaded document.
* Fixed an issue that unrelated content in the document be refreshed after an undo.
* Fixed an issue that certain interactive properties, such as canvas and shadow DOM, are lost after an undo.
* Fixed missing support of opening in new tab for `View index page` sidebar command.
* Fixed an issue that the opened postit is not saved when switching scrapbook.
* Fixed an issue that switching scrapbook after a change of server config can load incorrect tree data.
* Fixed an error causing the copy item dialog in a manage dialog not working.
* Fixed an error causing unit tests not working.

* Added options for whether to open in new tab for sidebar operations. Most operations now defaults to open in the active tab.
* Added support of opening in new tab by holding Ctrl or Shift for sidebar operations.
* Added support of adding as child item by holding Alt when creating a new item in the sidebar.
* Added support of recursive copy info by holding Ctrl or Shift.
* Allow opening multiple search tabs from the sidebar.
* Fixed an issue of missing `index` key when invoking `capture as` through dragging and dropping.
* Fixed an error when invoking copy info with an item having a malformed source URL.

* Improved GUI for batch capture dialog.
* Added support of captured pages notification for captures during the same browser session.
* Moved option `scrapbook.notifyPageCaptured` to `ui.notifyPageCaptured`.
* Notification of captured pages now updates when a capture succeeds.
* Reworked duplicates detection for auto-capture to check for captures during the same browser session and items in the backend server.
* Fixed an issue of script error for Firefox for Android < 55.

* Fixed a regression that saved filename for a capture does not have `/`s generated by a placeholder tidied.

* Added support of context displaying for the search page.
* No more save a file named `history.rdf`, which is preserved by MAFF format, when capturing a page.
* Fixed an issue of occasional unexpected extending of highlight range for the page editor.
* Fixed an issue that a text crop may cut between a unicode surrogate pair.