However, this has caused a number of problems in the past:
There is a character limit, so sometimes I have to truncate my PM, send, open the PM, and then edit in the text overflow
This is a non-standard editor, so it doesn’t have support for features like @/# autocomplete and the preview
Since I use “Something Else” flags and PMs so frequently, I habitually click the buttons instead of looking at them. Sometimes I send a PM as a flag, or a flag as a PM, and don’t realize since their text boxes are the same
Instead of having a selectable bullet option in that list for PMs, there should be a message button that opens the full editor with the appropriate template for flag PMs.
Thanks for raising that issue (which I’ve also wanted to do) and for what looks like a good solution mockup.
In the meantime, it might help to know that you can sort of (very sort of) work around the limitation by composing a message in that flag modal and then navigating to your messages and editing it (ideally within the 5 minute grace period, before it gets emailed out.) Won’t work so well, of course, of the recipient is online and reads it straight away.