The light and dark themes now use slightly different blues for their accent colors that is higher contrast.
Removed some unused code resulting in a memory leak and updated some documentation.
A few more style updates. Added theme awareness to the toolbar. Also switched the plot zoomer over to use blue instead of red as it's selector coloring to match the standard accent color for QGC.
Refactored QGC startup so that MainWindow::instance() is usable everywhere. This was required to get the styling working properly for ChartPlot.