Show current executing command in build report

[stsewd]

Closes #4288

Still need to figure out some cases and clean up a little, but this is kind of working right now.

[stsewd]

So, there is a little problem with the start_time var, I think I'm going to add the save & update as hooks for BuildCommand, something similar to what I was doing in #3687

[stsewd]

Another problem right now, the last command doesn't get expanded, I have no idea why :/

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[humitos]

How close is this to get this merged? It seems there are other problems that are blocking this PR.

I like the feature, but I think we won't spend too much time on it right now. I'd say to put the last effort if we are close to merge it. Otherwise, close it for now.

[stsewd]

Well, it's a cool feature. There are some problems with the js part to resolve, not sure if someone is interesting in touching the js part, I couldn't find a easy way to debug it with knockoutjs