IntelliJ CPU Usage Indicator plugin

CPU Usage Indicator in the status bar, just like the Memory Indicator.
Also contains actions for performance problems diagnostics.

• left click on the panel generates a thread dump (useful when the IDE is doing something on the background and you want to know what).
  
• configuration GUI for Performance Watcher (IDE's bundled automatic thread dumper for frozen UI). You can configure it to dump even for shorter freezes than is the default: 5 second.
  
  

Note:
-it is painted in a background thread, not EDT, so it will update even when the GUI is stuck
-getting the process usage is a quite expensive operation (5ms on i7-6700k@4,2GHz on Win10, 100x more than getting the system usage) :(