Fixed, Texture Browser, High-DPI: bottom panel of ImageSelectorControl had incorrect height when using DPI scaling.
Changed, SplitterControl, High-DPI: DPI scaling is now used when drawing expand/collapse area.
Documentation: fixed typos, filled "Compiling GZDoom Builder" page.
Added, Game configurations: added "thingclasshelp" property. It's used to open a website when thing class name is clicked in the Thing Edit form.
Changed, "Raise/Lower sector to nearest" action: 3d floors are now taken into account when using the action on things.
Updated documentation.
