Focus on the custom message field after picking an emoji.
Hitting the enter key while in the custom message field now triggers
saving.
Disable save buttons while saving is in progress.
Signed-off-by: Vincent Petry <vincent@nextcloud.com>
When selecting an emoji but not specifying a message, the internal
message value was null which caused a server validation error on
sending.
This fixes the SetStatusModal to always work with an empty string
upfront, as this is the value the field would have if edited and cleared
manually.
Signed-off-by: Vincent Petry <vincent@nextcloud.com>