Extra stuff done in this commit to facilitate the above (if you want to
really push my commit count, ask for more atomicisation):
- Register a bunch of widgets that are used in the process window.
- Allow setting the pid after the fact for the process state widget.
Combine the "PCI devices" and "Processors" tabs into a "Hardware" tab.
And then remove the "Interrupts" tab because the number of received
IRQ's per device is not really useful information to expose in this GUI.
If the user needs this, he can check lsirq.
This is done using a wrapper model that transforms all the information
about a single process in the ProcessModel and turns it into a 2-column
table model with only that process in it.
