sidebar: allow turning off tags view by default

With #37065, there is no way to hide the tags from the sidebar

by default when they are not relevant or redundant (e.g. the tab

may already show the file's tags). This can be annyoing especially

when the file has many tags. This patch adds an option to hide

the tags from the sidebar by default (the user can still open

the tags tab manually).

This also reduces one request when opening the sidebar when the

tags are turned off, since all tags don't need to be fetched

anymore.

Signed-off-by: Varun Patil <varunpatil@ucla.edu>

Signed-off-by: nextcloud-command <nextcloud-command@users.noreply.github.com>

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Author: pulsejet