[RSSManager] Fix some small leaks.
What is this? I didn't write it ...
Modified copyright year
[RTL Layout] Set layoutDirection of widgets with LTR contents to LTR, for having a better look.
- closes #971
Set WM_CLASS also to Download Manager.
[ThemeManager] Fixed crash on saving settings when theme is unavailable.
Preferences: Load autofill page on-demand

Don't ask for master password when preferences dialog is opened.
Only ask for it when user actually enters autofill page.
Fixed compilation with Qt 5
Don't clear active state of plugin's sideBar on closing.
Merge branch 'master' of https://github.com/QupZilla/qupzilla
Fix pagescreen