OSX: Added implementation in loop-related presenters + bind UI controls.

- Worked mainly on loop details, a bit on segment details.
OSX: Implemented most of SegmentDetailsPresenter.

- All controls work, but there are some bugs with the data validation.
OSX: Added loop segments to wave form overlay.

- Fixed bug in database script.
OSX: Implemented right formula in FocusZoomOnSegment in WaveFormScrollView.
OSX: Added custom check box, fixed bugs in WaveFormScrollView when focusing on a segment.

- Added MPfmCheckBox with CheckBoxControl for a generic and flat
checkbox (the OSX checkbox style did not fit with the flat design).
- Added MPfmLabel for detecting clicks on labels.
- Added outline in DrawRect in GraphicsContextWrapper.
- More bug fixes (see diff).
WPF: New look for EffectsWindow, matching the one on OSX.

- Fixed build after changes on OSX.
WPF: Fine tuned layout for Marker Details, added views to MainWindow.

- Added views for Loop Details, Segment Details and Loop Playback (all
placeholders for now)
- Updated toolbar in MainWindow.
- Added missing converter from last commit.
Linux: Fixed build after changes on other platforms.