Arvados

From discussion: char limit for Project and Collection descriptions should be set at 524,288 characters

21884-collection-richtext @ 11a0e48e0b3f14cd4343860085118926f744a537
developer-run-tests-services-workbench2: #1492

• ✅ All agreed upon points are implemented / addressed.
• n/a Anything not implemented (discovered or discussed during work) has a follow-up story.
• ✅ Code is tested and passing, both automated and manual, what manual testing was done is described
• ✅ New or changed UX/UX and has gotten feedback from stakeholders.
• n/a Documentation has been updated.
• ✅ Behaves appropriately at the intended scale (describe intended scale).
• ✅ Considered backwards and forwards compatibility issues between client and server.
• ✅ Follows our coding standards and GUI style guidelines.

• I also added a limit of 524,288 characters to the Project description, which previously had no limit.

Lgtm!