Update Ui Modification

Updates a UI modification. UI modification can only be updated by Forge apps.Each UI modification can define up to 1000 contexts. The same context can be assigned to maximum 100 UI modifications.**[Permissions](#permissions) required:** * *None* if the UI modification is created without contexts. * *Browse projects* [project permission](https://confluence.atlassian.com/x/yodKLg) for one or more projects, if the UI modification is created with contexts.