removed a line deleting setting widget for a tool - it was causing a crash when reactivating the previously deactivated tool with a setting widget

fix photos ordering bugs when in `ScaleSettingWidget` + clicking `Cancel` closes the widget when in importing phase (Issues #209, #210)

delegated scale extraction in ImportDialog to ScaleSettingWidget's method + fixed crash when clicking "Assign scale value to all photos" (Closes #208)

some exception handling when downloading + included Tesseract back in the repo (not in pypi package though)

changed the title of the app to 'MAPHIS', the title includes the location of project and the name of the currently viewed image

Rename 'arthropod_describer' to 'maphis'

See merge request xmraz3/arthropod_describer_py!3

convert 'arthropod_describer'-specific keys to 'maphis'-specific keys to be compatible with projects created before the name change