Copy MouseText characters from the screen as Unicode

[ct6502]

from @cogburnd02 on Discord: When you output mousetext characters (say, the folder image composed of two mousetext characters) to the text screen (there are instructions for doing this in the MouseText wikipedia article) and then copy the text screen & paste it into a text editor, erroneous characters are output. The specific characters that should be output are part of the unicode block Symbols for Legacy Computing which has a wikipedia article. Perhaps a lookup table to see if the string-to-copy-to-the-clipboard contains any mousetext characters and the replacement characters from the Unicode block table on wikipedia?