Merge pull request #231 from camilleghirne/master

css page tool and menu styling, less imports
Merge pull request #232 from camilleghirne/master

Design change, dark theme
Merge pull request #233 from lexoyo/master

Dockable dialogs
Merge pull request #234 from lexoyo/master

update ace editor + css, js, html editors in black + auto completion
adjustments for @camilleghirne new design
wording and adjustments