Dckit

- fix: cancelling join measurements did not work (14)
- setup: bump dclab from 0.34.4 to 0.34.5

- ref: cleanup - call overloaded processEvents
- ref: get rid of deprecation warnings
- setup: bump dclab from 0.33.3 to 0.34.4 (use temporary files)

- setup: bump dclab from 0.33.1 to 0.33.3 (some datasets with
unknown features could not be opened)
- fix: add titles to dialog windows

- build: fix pyinstaller builds

- fix: detect and automatically fix (if possible) wrong medium
written by Shape-In (16)
- setup: bump dclab from 0.32.5 to 0.33.1 (17)

- fix: regression (in a793ed) where "medium" was not saved in the
user-defined meta data
- fix: in some cases there were two combo boxes for "medium"
in the integrity check dialog (12)
- fix: allow to remove items in integrity check dialog
- ref: refactored combobox selection in integrity check dialog
- setup: bump dclab from 0.32.2 to 0.32.5
- build: overhauled build pipeline