Terminal usability issues

[marcmo]

Open

• [ ] Terminal button now switches to the command view, but the command text field needs to get focus

• [ ] execution of command should switch to observing

Done

• [x] executing a command that does not exist does not give an error message

• [x] working folder should not be a text-field but a label

• [x] opening the terminal tab should be done with just 1 click (no submenu needed)

• [x] enter new command should be extended by default and current folder should also be a label

[DmitryAstafyev]

About working folder input. Moving the label outside of the input makes viewing painful. I am not sure, it's a good solution. We already have a disbalance on the right side of inputs (because there is a button) and extra disbalance on left side doesn't make it better

UPD: not relevant comment