Bump dashboard description max length limit to 1.5K

[kulyk]

Part of #43983, internal discussion here

Bumps dashboard description max length to 1500, it's validated when a dashboard is created, copied, or whenever it's changed via the dashboard sidebar

Demo

CleanShot.2024-06-25.at.15.39.09.mp4

[replay-io]

Status	Complete ↗︎
Commit	a0d4674
Results	⚠️ 2 Flaky ✅ 2694 Passed

[WiNloSt]

Can we have at least like a single test for each of these components?

edited: I came to think about it, this is already a schema, maybe there's no need to test that.

[alxnddr]

The original thread mentions questions as well and even though we don't have validation for creating questions, there is 255 limit on cloning questions in frontend/src/metabase/questions/components/CopyQuestionForm.tsx

[perivamsi]

The original thread mentions questions as well and even though we don't have validation for creating questions, there is 255 limit on cloning questions in frontend/src/metabase/questions/components/CopyQuestionForm.tsx

let's keep questions in a separate scope and do it as a part of a larger design effort

[alxnddr]

let's keep questions in a separate scope and do it as a part of a larger design effort

I meant there is a bug that can be fixed right here by changing 1 constant. We already allow adding >255 chars to a question description when creating a question but the duplication form has wrong validation:

Screen.Recording.2024-06-25.at.10.54.46.AM.mov