SystemMonitor: Add tab with detailed state to process properties window

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.

Userland/Applications/SystemMonitor/CMakeLists.txt

@@ -9,6 +9,7 @@ set(SOURCES
     ProcessMemoryMapWidget.cpp
     ProcessModel.cpp
     ProcessUnveiledPathsWidget.cpp
+    ProcessStateWidget.cpp
     ThreadStackWidget.cpp
 )