* Fix look of position time field to match the rest of the UI.
* Fix typo.
* Improve position time display.
* Add days, hours support to position time display.
* Fix "Current Time" toolbar item geometry/layout.
* Don’t enforce leading double-digits in position time display.
* MainMenu.xib touched by Xcode.
* Implement and use MonospacedDigitTextFieldCell.
This way the digits of numbers in playlist columns consisting of mostly digits will be aligned vertically.
* Disable font scaling code without effect.
* Set "Current Time" toolbar item to use MonospacedDigitTextFieldCell.
* Improve SecondsFormatter.
* Merge in SecondsFormatter improvements from Play.
* Move formatter setup into XIB.
* Add CogTests.
These can later be used for integration tests.
* Add SecondsFormatterTests.
Tests are stubbed out.
* Pouring foundation for SecondsFormatterTests.
* Implement -testPositive.
* Replace unsigned with int in SecondsFormatter.
* Implement negative support, tests.
* Rewrite SecondsFormatter in preparation for better readability..
* Rewrite SecondsFormatter for better readability.
* Add negative zero support.
* Improve SecondsFormatter readability.
* Refactor into -stringForTimeInterval: in SecondsFormatter.
* Cleanup.
* Mark TimeField as space-indented.
* Replace custom time formatting code in TimeField with SecondsFormatter.
* Cleanup.
* Improve SecondsFormatter format strings.
* Add internal type for time calculations.
Co-authored-by: Jan Weiß <jan@geheimwerk.de>