I had to rename PNGs, but updated qmake buildsystem so it still works
(kind of, there are duplicate pngs installed, no big deal...)
Only tested on Linux, but tried to write the cmake code for OSX and
Windows specific things too.
- added AdBlock menu into WebView context menu
- added new test file for AdBlock
- small modifications in QupZilla icon
- fixed bug in downloads when accepting Preferences dialog
also accepted opened download dialog
- fixed session restore problem, where tab url wasn't
properly restored (and instead loads empty search on
active search engine)
- fixed loading icons in next/back history menu
