[WebView] Make Direction & Fonts menu translatable.

Closes #871
[Hebrew] Adde Hebrew translation for Linux launcher and Windows installer.
[AdBlock] Fixed hiding rules when more than 5000 rules in subscription.

Closes #873
[SessionRestore] Fixed saving some tab icons in session file.

Saving directly QPixmap instead of QIcon fixes issue when some
icons don't save correctly for some reason (eg. oxygen hdd icon).
[Code] Skip one allocation of QDialog on heap.
[Mac] Attempt to fix slow scrolling on Apple trackpads.

Closes #832
Fix icons incorrect sRGB profiles. Closes #843
Optimization of png icons
Optimization of png icons for plugins
[Acid3] Make Acid3 test pass with enabled AdBlock.

AdBlock element hiding rules are inserted into body element of
page. This does not like the Acid3 test.
[SpeedDial] Use page title from bookmarks when adding pages.
[Downloads] Use better translation string for manager's title.

See #878
[Qt translation] Updated Portuguese Qt translation.
Serbian qt translations update
[AdBlock] Improved regex for hiding AdBlock code in source viewer.
Fixed building with Qt 4.7
Version 1.4.3 is now released.
[LocationBar] Added inline completion for domains.

Closes #880
[LocationCompleter] Hide completion popup after Alt+Enter.

Hides completion popup after opening new tab with Alt+Enter shortcut.
Fixes in inline completion + enter completed text with left arrow key.