Display the text "invalid key" instead of a red X icon in SSH Keys panel

Some users were confused by the red X placed next to an SSH key.  They
thought this was a delete icon, to remove a key from the key list.  It
was meant to signal an invalid key.

We instead now show the slightly less ambiguous "Invalid Key" message
as English text, bold and in red, so its very clear that this key is
not a valid key.

Signed-off-by: Shawn O. Pearce <sop@google.com>
4 files changed