Fixed, Map Analysis mode: fixed a crash when trying to dissolve an invalid sector when one of it's linedefs referenced it on the both sides.
Fixed, Sectors mode: fixed incorrect undo description when deleting sectors.
Internal: joined declaration and assignment of some more variables.
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.