Sidebar enhancements

[alaskanpuffin]

Fixes and improves the sidebar interface.

Changes

• Fixes sidebar header icon. Now uses Nextcloud icons, because the svg api has been deprecated.
• Standardizes styles and cleans up favorite form
• Automatically closes sidebar on favorite delete
• Confirmation messages for favorite form save/delete
• Removes sidebar button from top right corner of map (it appears to do nothing and only opens a blank sidebar, but I could be missing something)

Updated Sidebar Layout

Confirmation Dialogs

[tacruc]

@alaskanpuffin thanks, why are there so many translation changes in the PR? Is it on purpose?

[alaskanpuffin]

I merged master back into this branch, and it looks like it interpreted them as changes I made as opposed to a merge.

[tacruc]

Hm wired, there are apparently also conflicts with the Favorite Edition Form. Could you remove commit 0c92 and maybe rebase on master again?