DONE: [12.40b1] Hash Generator

[pjj]

This is clearly not a bug report, but rather a set of two^Hthree suggestions for a better UX:
1) make output window (i.e. the one containing hash) read-only
2) add two buttons: copy (hash to clipboard and close), paste (hash at cursor and close)

Perhaps adding yet another option to calculate hash from the active document would prove helpful, too.

[micha_he]

.... and maybe use the selected text as input-string when open the hash-generator.

[Rickard Johansson]

Added suggestions in next release. Thanks!