Cleaning.

Removed dev test code for parsing go compiler errors.
Minor.

Changed resolution from 1280x960 (4:3) to 1536x960 (16:10).
Disabled debug printing related to background processes.
Made GitDiff and GitStatus widgets work properly with spaces in paths.
Disable m_GetLineAnnotations when Live Toggle is off.
Auto GitDiff add to TextFileWidget via IsFileTrackedByGit(). Dependee connector added to TextField via LiveProgramFileWidget.

Added IsFileTrackedByGit(Path).
Added Vertical mode to FlowLayoutWidget.
Added Dependee in LiveProgramFileWidget.
Temporarily disabled GetWidgets()[0] code in TextFieldWidget so that
Dependee will work.
Changed TextFileWidget to vertical FlowLayoutWidget.
Added TextFileWidget::NotifyExternalChange().
Added GitFileWidget (might not be needed).