Application:
- Consider migrating to WPF in order to make DPI aware UI
V Special cursor to indicate baseline set
V Special cursor when dragging canvas with middle mouse button

Functionality:
V Show note field in Export comments
V When Rectangle selection tool is active hold Ctrl+Alt to temporary disable it to be able to draw
V Frame screenshot can be copied to clipboard with some limitations (no transparency)
V Beside Baseline, also make top and mid lines

Bugs:
V Fixed "Frame modified" check. It leaves modified flag if user refused to save changes.
V Middle mouse button tries to change selection while dragging canvas with rectSelection tool active