Update cards with missing "images"

Right now there are a few cards that you can select from that do not have an “image” (I am aware its not an image but the actual card itself but you get the idea). This is not a huge issue, but i find myself glossing over them quickly, forgetting what their use is. Seeing as most cards do have a visual representation i’d like to see the ones missing to get one as well, would just be some nice UX.

Cards that do not have an “image” include:

  • Alarm Panel
  • Statistics Graph
  • Statistics
  • Humidifier
  • Plant Status
  • Thermostat
  • Conditional
  • Entity Filter
  • Grid
  • Horizontal Stack
  • Webpage
  • Logbook
  • Vertical Stack
  • To-do List