Improve feedback for full storage

[MorrisJobke]

• set up a files external mount point that should be used by all users
• set quota to 0 (so that they only can upload to the mount points)

It would now be nice to not show the warning Your storage is full, files can not be updated or synced anymore! if there are mount points specified (or show it less invasive).

@nextcloud/designers Ideas? Maybe something like we use in the read only shares, which is not that invasive:

[skjnldsv]

If we implement this, we could easily add a red warning or something as the icon :)

[MorrisJobke]

If we implement this, we could easily add a red warning or something as the icon :)

This was also to make this less important, because there are also use cases where this is just unneeded info. So making this just a little grey text where usually the upload button is, would be the best I think.

[skjnldsv]

I feel like this is an important information though :/
But i'm okay with a text above the files :)

[juliusknorr]

Since we have the quota now in the left sidebar, we could just drop this message or move it to the quota section:

[skjnldsv]

I agree with @juliushaertl

[jancborchardt]

Yup! The showNotification should not be shown anymore. But we should also show this notice in the + (new file / folder menu) and deactivate those entries (except add folder cause that’s just reorganization, right?)