nova: Expose use_serial to UI

[nicolasbock]

Right now the use_serial switch is hidden in the raw view but it's
useful enough to expose it in the UI.

[Itxaka]

May need to open a bug for the docs to be updated methinks

[nicolasbock]

@Itxaka oh, right, totally forgot about that 😄

[nicolasbock]

Filed bsc#1021701.

[dirkmueller]

I'm totally not convinced that it should be exposed because;

• It requires novnc to be disabled
• It is completely unprotected
• Only one client can access the console at any time

Was therr any request for this being exposed?

[nicolasbock]

@dirkmueller Yes, someone asked me yesterday on #cloud if we could enable it. I figured I would just throw this out on GitHub since it was so straightforward to do 😄. It sounds like we rather shouldn't do it though.

[vuntz]

@nicolasbock can you add a hint (we have some in the dns barclamp, if you need an example) to explain to the user the limitations, especially the part about disabling novnc?

[nicolasbock]

@vuntz I have added the hints @dirkmueller provided. Is there a way to format the hints more like a list? I tried inserting html, but that didn't work.