fix(SharedItems): fetch after page reload + fix(Conversation): set warnings on max length

[Antreesy]

☑️ Resolves

• Fix Sidebar spinning indefinitely when reloading 'Note to self' #11433
• Fix long description is not saved when creating conversation #11659
• Fix big image fallback when creating new conversation with federated

🖌️ UI Checklist

🖼️ Screenshots / Screencasts

🏚️ Before	🏡 After

🏁 Checklist

• 🌏 Tested with Chrome, Firefox and Safari or should not be risky to browser differences
• 🖥️ Tested with Desktop client or should not be risky for it
• 🖌️ Design was reviewed, approved or inspired by the design team
• ⛑️ Tests are included or not possible

[DorraJaouad]

I think it would be better if you show max length somewhere ( either in a counter or in error message) so if a user pastes a text, they can know how many characters they should reduce.

[Antreesy]

I think it would be better if you show max length somewhere ( either in a counter or in error message) so if a user pastes a text, they can know how many characters they should reduce.

What about t('spreed', 'Maximum length is exceeded by ({length}) characters'), where {length} is a diff?

[DorraJaouad]

What about t('spreed', 'Maximum length is exceeded by ({length}) characters'), where {length} is a diff?

Let's not depend on that, diff can be get to extreme cases easily (100000000000000000) and won't look good

[alexanderdd]

Thank you!

Is it possible to backport this to earlier Nextcloud versions like 28, 27?

[Antreesy]

/backport to stable28