Small refactoring of the loadingBar hiding code
Fix loadingBar hiding when disableAutoFetch is enabled (issue 3590)
Allow localization of the placement of percent signs in the zoom box
remove null checks that always evaluate to false
use fewer multiplications in convertYcckToRgb
Bug 1076909 - change args order in registerAddonHistogram.
Merge pull request #5428 from yurydelendik/regaddon

Bug 1076909 - change args order in registerAddonHistogram.
Prevent text selection in Presentation Mode (bug 1018882)
Remove any active text selection when entering Presentation Mode
Import L10n
Merge pull request #5416 from Snuffleupagus/percent-sign-l10n

Allow localization of the placement of percent signs in the zoom box
Merge pull request #5203 from Snuffleupagus/disableAutoFetch-loadingBar

Fix loadingBar hiding when disableAutoFetch is enabled (issue 3590)
Merge pull request #5478 from Snuffleupagus/bug-1018882

Prevent text selection in Presentation Mode (bug 1018882)
Merge pull request #5473 from fkaelberer/fewerMultiplicationsInYcckToRgb

Use fewer multiplications for Ycck to Rgb conversion