Add the viewBookmark button to the secondary toolbar
Fix external links in Presentation Mode (issue #3755)
Merge pull request #3739 from Snuffleupagus/bug-921162

Add the viewBookmark button to the Secondary Toolbar
Merge pull request #3759 from Snuffleupagus/issue-3755

Fix external links in Presentation Mode (issue 3755)
Refactor Presentation Mode code
Merge pull request #3763 from Snuffleupagus/refactor-PresentationMode

Refactor Presentation Mode code
Merge remote-tracking branch 'upstream/master'