D23278: LESS: import CSS keywords, new highlighting and some improvements

[jonathan poelen]

jpoelen added reviewers: Framework: Syntax Highlighting, dhaumann, cullmann.

REPOSITORY
  R216 Syntax Highlighting

REVISION DETAIL
  https://phabricator.kde.org/D23278

To: jpoelen, #framework_syntax_highlighting, dhaumann, cullmann
Cc: kwrite-devel, kde-frameworks-devel, LeGast00n, domson, michaelh, ngraham, 
bruns, demsking, cullmann, sars, dhaumann