Add 'collapse all' and 'link with main panel' buttons to navigation

Signed-off-by: Madhura Jayaratne <madhura.cj@gmail.com>
Change icon with sprites

Signed-off-by: Madhura Jayaratne <madhura.cj@gmail.com>
Merge pull request #1104 from madhuracj/nav

Add 'collapse all' and 'link with main panel' buttons to navigation
Invert images

Signed-off-by: Marc Delisle <marc@infomarc.info>
Regenerate sprites

Signed-off-by: Marc Delisle <marc@infomarc.info>
Update po files
Avoid empty block notices

Signed-off-by: Marc Delisle <marc@infomarc.info>
Translated using Weblate (Turkish)

Currently translated at 100.0% (2961 of 2961)

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Translated using Weblate (French)

Currently translated at 100.0% (2961 of 2961)

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Use link and unlink to avoid confusion. Bind .on event to document not to be affected by navigation reload. Update title as functionality changes.

Signed-off-by: Madhura Jayaratne <madhura.cj@gmail.com>
Translated using Weblate (Spanish)

Currently translated at 100.0% (2961 of 2961)

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