Relevant Linear issue [[ https://linear.app/comm/issue/ENG-1349/disable-save-button-after-settings-are-saved-in | here ]]. Also see @tomek's [[ https://phab.comm.dev/D4416#125482 | comment ]] on D4416. This issue arose after we decided to leave `ThreadSettingsGeneralTab` open after the user had clicked the Save button, since the Save button remained enabled even if there were no changes to be made.