Let chat input adapt to small heights

Using a hack from Dino:
https://github.com/dino/dino/blob/v0.2.0/main/src/ui/chat_input/chat_text_view.vala#L51
3 jobs for 71-multi-line in 3 minutes and 43 seconds (queued for 5 minutes and 46 seconds)
Status Job ID Name Coverage
  Test
passed #6860
pycodestyle

00:01:29

passed #6861
pylint

00:02:14

manual #6862
allowed to fail manual
pytest