Adding icon setting
Updating and negative box adjusting
Implement key-based navigation
Merge pull request #31 from aliceh75/29-key-navigation

Implement key-based navigation
Refactor mouse event handling to use handlers rather than naming convention. Fix various mouse event issues.
Add zoom handling by using the wheel with the control key
Merge pull request #33 from aliceh75/clearer_mouse_handling

Refactor mouse event handling to use handlers rather than naming convention
Merge pull request #35 from holtzhau/boxresize

Boxresize
Added annotator dialog
Added importing and saving of boxes
Format fixes
Moved method
Fixes
Csv to json in import export
Fixes
Set focus to table widget
Rebase fixes