Request: Display a "Use" button when hovering context

[csmarttemplates]

Requiring a right click is clunky way to access the use action (and inspect for that matter).
It would be nicer if when you hover a context a "Use" button would be displayed the same way as the Pencil icon is shown to the right of the text label when you hover a breakpoint in the debug view.

Would be nicer if there was an icon like the pencil below. It would save a click!

[bwateratmsft]

I think this would be possible using a view item icon, which is what is present there in the breakpoints list.

@csmarttemplates we would need to use an icon from VSCode's Codicons list. From there I was thinking maybe "play", "debug-start", or "check", but I'm definitely open to other ideas. Can you check out that icon list and see if any seem like a good fit to you?

[csmarttemplates]

I think I like "check" the most. "play" and "debug-start" are good but might be a little confusing since it implies something is being started rather than selected.

[ucheNkadiCode]

@bwateratmsft, let me know if these details are clear enough and if you agree with the icon selection.

Implementation details:

• On Hover: Display an icon (likely the check icon from vscodicons) the user can click to use that context.
• If the context is already being used, check icon will not be displayed.
• Socket Icon will continue to constantly display context is currently in use regardless of on hover
• Maintain functionality to right click and either select inspect or use.

[bwateratmsft]

This change is now released with Docker extension version 1.12.0.