[xml mode] Make it actually possible to disable multilineTagIndentPastTag

Closes #2262
[solarized theme] Fixing tab character visual

Doesn't take up any space now, so that a tab of width 2 is 2 em width
rather than 3.
[show-hint addon] Default to hinting with anyword, when nothing else is found

(Only works if anyword-hint.js is loaded.)
Merge remote-tracking branch 'source/master'
[htmlmixed mode] parserConfig data now gets passed on to xml mode

Closes #2262