[TASK] Topbar: Livesearch dark+focus

Kodus to @NamelessCoder for invert.
[TASK] Text/headline color - darker

Thanks to @NamelessCoder
[TASK] Colors

Adapt coloring
[BUGFIX] t3-table / list-view Color fall-back

Thanks to @NamelessCoder
[FEATURE] Invert colors of PageTree & FileTree (wip)

Thanks to @NamelessCoder
[BUGFIX] Docheader paddings
[TASK] Page module coloring (remove columns visually)

Kodus to @NamelessCoder
[TASK] ext_emconf cleanup