add save button

[grnd-alt]

We keep getting issues from users complaining abt whiteboard not saving/beeing confused with when it's supposed to save.
I think we should add this button as text has it. That way users get feedback that their process is not lost.

@nextcloud/designers any objections on this?

[szaimen]

@nextcloud/designers any objections on this?

Sounds good to have a dedicated save button imo :)

[hweihwang]

Looks good, tested works well at my local. But imo not a big fan of a Save button in the context of collaborative tools since when, where, how to save should automatically, properly handled in the whiteboard server. Prefer to rather do a periodically saved to Nextcloud server and notify users if any issues occurred.

This is related and can resolve the saving issue #238 by:

• Perform a check on the whiteboard backend and verify that it can connect to Nextcloud at Whiteboard admin setting
• Data management improvements #259 introduced a backup layer in case any errors occurred when saving or even the whiteboard server suddenly crashed like at Whiteboard Crashes after using it for 25+ minutes #258

But the Save button is still good so we can perform a check to save when users needed and will save users' data in case server got crashed like at #258, but maybe need to add a notification for user when saving is failed @grnd-alt with some proper messages

[marcoambrosini]

I agree on that this shouldn't be a button, but a non interactive element instead.