Make the process tree hiearchy clearer

[phyrophone]

• Automatically resizes the pid column so that deeply nested parts become visible. Previously, the PID numbers vanished and you couldn't see the expand/collapse icon if you went deep enough.
• Aligned the pid number to the left, making the hierarchy clearer.

[benapetr]

it works, but it feels a bit weird how it keeps forcing the auto-sized column on your every refresh. Eg. if user manually changes the column width, on next refresh it forces back the automatic one. This gives weird user experience, I think we shouldn't allow user to change the size if we are going to reset it later anyway, I will explore which options exist here to make it behave less inconsistent, or maybe we should just stop auto-sizing if user decides to manually resize it.

Or maybe we can just calculate the width once on the first sync, and not on every refresh.

[phyrophone]

I've now disabled the user's ability to resize the pid column.