Include the type when printing a ConstantIntegralType.

Otherwise, how could one differentiate between "7 foo" as being
a float, int, unsigned, char, double, ... 7?

BUG: 252985
Cleanup header.
Minor: Remove unused includes
PluginController: More debug messages
Fixup parent commit

Only print warning if the plugin loading really failed
Konsole: Report why plugin could not be loaded

Changes:
- Always instantiate KDevConsoleViewPlugin,
  but: hasError() == true if konsolepart could not be located

=> Proper error reporting during startup
Fix typo
Merge branch '1.7'