Optimize binary size under MSVC linker.
Sort invalid dates regardless of sorting order.
Fix text size problem on Windows with custom DPI. (closes #758)

On Windows FontMetrics seem to be broken when custom DPI is set by the user.
Allow more fine tuning of uploads. Closes #684.

Conflicts:
	src/preferences/options.ui
Respect UI lock when clicking on tray notification. Closes #784.
Update changelog.