Glyph actions

Covers https://github.com/KSHSK/WAVED/issues/227, https://github.com/KSHSK/WAVED/issues/206, https://github.com/KSHSK/WAVED/issues/286, https://github.com/KSHSK/WAVED/issues/295

Edit: Incidentally also covers https://github.com/KSHSK/WAVED/issues/269
Why can't you just add these directly to `allSubTargets`? (if this change is even necessary: see previous comment)