Support pasting selected cards when carddetails textarea is focused

to remove the ambiguity in https://forum.kinopio.club/t/add-copy-to-current-space-option/1609/11?u=pirijan

technotes to self:

  • keyboardshortcuts needs to spin off paste (maybe also copy/cut) events into seperate space.vue (store?) component
  • carddetails needs to check against the new component methods to determine whether to paste regular text or close the card and paste the clipboarddata

fix released so this now works

  1. Copy image
  2. Click to add card
  3. Paste image via Ctrl+V