Feature request: Put more info in the status bar

Based on QPS 2.3.0

Current behavior:

QPS only shows the Process count in the status bar.

Desired behavior:

QPS shows Process count, CPU %, Used RAM / Total RAM, Used Swap / Total Swap (like ksysguard) in the status bar.

Rational:

The graph requires you to hover over each item to get the numbers and the status bar has a lot of unused space. This behavior is similar to KDE, Windows' Task Manager (before Windows 8), and sort of like macOS' Activity Monitor.