fix: dashboard performance problems

[szaimen]

• Closescrolling in dashboard is laggy #44122
• linked to fix: appnavigation performance problems nextcloud-libraries/nextcloud-vue#5607

[szaimen]

/backport to stable29

[szaimen]

/backport to stable28

[susnux]

We use this also in other places, like login form. Same filter is also applied to the app navigation.
So this should be discussed generally for our design, cc @nextcloud/designers .

Also note this only happens if you run a Blink engine browser without hardware acceleration.

If we want to keep semi transparent backgrounds then we maybe should add this as a CSS variable an provide a variant of the default theme with transparency disabled.

[jancborchardt]

Also note this only happens if you run a Blink engine browser without hardware acceleration.
If we want to keep semi transparent backgrounds then we maybe should add this as a CSS variable an provide a variant of the default theme with transparency disabled.

@susnux sounds reasonable to me! I would say we shouldn’t disable the frosted glass outright.

[szaimen]

Also note this only happens if you run a Blink engine browser without hardware acceleration.
If we want to keep semi transparent backgrounds then we maybe should add this as a CSS variable an provide a variant of the default theme with transparency disabled.

@susnux sounds reasonable to me! I would say we shouldn’t disable the frosted glass outright.

So adding another theme? Sounds overengineered to me honestly... Is there maybe a way to add semi transparent backgrounds without crippling performance?

[szaimen]

Closign in favour of #45395