Change some colors for better contrast, styled some unstyled elements. * Background of find-keyboard-shortcut-window does now have the same color as the editor window. * Text color of folded code is now equal to the text color of comments. * Hover color in version control commit list is now the same color as hover color for tabs. * Hover border color is now brown (e.g. toolbar icons) * Active tool window bar tab background color is now brown instead of black (black was barely visible) * Debug window tab underline is now brown instead of grey when the window has no focus (the same color as for all other tabs) * Increase contrast of file-tree background colors * Changed color of titlebar on Windows when window is inactive