Finished Hebrew window installer translation.

Thanks to GreenLunar.
https://github.com/QupZilla/qupzilla/commit/bef40d2ca6a69469621f28e46c6a2a0d584b3077#commitcomment-3576703
Don't leak when setting WM_CLASS
Define QzTools::setWmClass on all platforms.

Get rid of #ifdef's and make it do nothing on non X11.
Fix compile on non X11 platforms
[GreaseMonkey] set list of userscripts as LTR widget.

-its contents are in LTR regardless of interface language.
-Closes #967
Fix compilation with Qt 5.1
Merge branch 'master' of https://github.com/QupZilla/qupzilla
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