Add shortcuts for common keyboard combinations #381

[edlerd]

Done

• add shortcuts to the console view of an instance

Fixes #381

QA

1. Run the LXD-UI:
   • On the demo server via the link posted by @webteam-app below. This is only available for PRs created by collaborators of the repo. Ask @lorumic or @edlerd for access.
   • With a local copy of this branch, run as described in the Readme.
2. Perform the following QA steps:
   • test keyboard shortcuts in console view

[webteam-app]

Demo starting at https://lxd-ui-383.demos.haus

[lorumic]

There's a fundamental UX problem here: once you go "Fullscreen" - and you're likely to do that immediately on a Windows VM if you're using a medium/small res screen, since the mouse tracking is completely broken otherwise - you don't have access to the shortcuts anymore. Which means that each and every time you want to use one, you need to exit full screen, select the shortcut, and go full screen again.
What I have in mind is something similar to what TeamViewer does for example. In fullscreen mode, you move the pointer to the upper edge and an auto-hiding toolbar with controls appears. Would it be possible to do something like that here? Make some element overlay the spice wrapper - with CSS position - and making it visible only when the pointer is in some upper region of the full-screen window?
It can also be postponed if it takes too much time, and we want to release a quick fix.

[lorumic]

See above for a possible improvement. In general, the VGA console still has some major issues on low resolution screens - for Windows VMs at least.

[edlerd]

The overlay is a good idea. Though hard to get right. Because it easily gets too often into the way if it shows to soon. Finding a good balance for it might take a bit bigger initiative. For now let's unblock the windows login.

[lorumic]

Sure, sounds reasonable to me.