[PDFHistory] Prevent the history from getting stuck in certain edge cases
Prevent named actions from displaying a 'resource://' URL in Firefox
Avoid triggering rendering multiple times when zooming using the mouse wheel
issue #3346

squashing commits.
Disable range requests in old Android versions
Merge pull request #3421 from Snuffleupagus/avoid-multiple-rendering-on-wheel-zoom

Avoid triggering rendering multiple times when zooming using the mouse wheel
Merge pull request #3618 from Snuffleupagus/followup-3557

Prevent named actions from displaying a 'resource://' URL in Firefox
Merge pull request #3507 from Snuffleupagus/PDFHistory-fix-multiple-identical-states

[PDFHistory] Prevent the history from getting stuck in certain edge cases
Secondary toolbar
Merge pull request #2792 from timvandermeij/settings-bar

Secondary toolbar
Properly disable presentation mode when the viewer is embedded
Prevent searching during load from breaking the find functionality
Simplify getVisiblePages() in presentation mode
Update the Swedish l10n with secondaryToolbar strings
Merge pull request #3646 from Snuffleupagus/secondaryToolbar-l10n-Swedish

Update the Swedish l10n with secondaryToolbar strings
Merge pull request #3644 from Snuffleupagus/presentationMode-simplify-getVisiblePages

Simplify getVisiblePages() in presentation mode
Merge pull request #3607 from Snuffleupagus/issue-3604

Prevent searching during load from breaking the find functionality
Update readme with what files are needed.
Annotation selection
Fix searching in presentation mode in Firefox