Fix entering navbar editor in expanded desktop mode.

Uses the new system UI visibility flag to show the navbar in expanded
desktop mode.

Change-Id: Ia515b3c5a73d0741c3aad5421c9ac46d9876c177
Update German translation.

Change-Id: I0fcb49b9ae2f2da0b37a22bf9e56baab6b09b174
Merge "Fix entering navbar editor in expanded desktop mode." into cm-10.1
Merge "Update German translation." into cm-10.1