New feature
- Add Tests.
- Add "-selectcolor" option to ColorVar list.
Enhancement
- Reorganise tkmacosx package files into multiple packages.
- Reorganise button items to a separate class.
Bug
- Fix `Misc._configure()` returning 'NoneType'. (12)
- Fix text misalignment when changed dynamically under certain situations.
- Fix -activebackground" not accepting mac deafult system colors names.
- Fix button appearance when toplevel is out of focus.
- Fix `focusthickness=0` glitch of button.
- Fix ColorVar not working with -focuscolor of button.
- Fix unknown option "-bitmap". error
- Fix "-width", "-height" have effect on 0 value.
- Fix Marquee `cget()` issues.
- Fix "-activebackground" not changing with Variable.
- Fix ColorVar not working with few Button options.
- Fix lag when Button is configured.
- Fix an error with `Button.destroy()`. (17)