Recast needs its own UI action button.
There's also Witch Bolt that hides the recast version in the mess of a hotbar. Now if only Witch Bolt didn't suck horribly and be completely sub par compared to free cast cantrips after level 5...
There will be Spiritual Weapon and Flaming Sphere type spells too which you can operate as a bonus action. Maybe these kind of situational actions should be all grouped together.