QmlProfiler: Refactor

The code of the qmlprofiler client has become a bit too complex,
this patch reorganizes the modules in a more sensible way,
having the modules communicate with each other through a
state machine instead of the excess of signals and slots
from before.

Change-Id: I76f7313779888a1bd07a1cdb1acbf2e47aacf42a
Reviewed-by: Kai Koehne <kai.koehne@nokia.com>

src/plugins/qmlprofiler/qmlprofilerconstants.h

@@ -37,6 +37,7 @@ namespace QmlProfiler {
 namespace Constants {
 
 const char ATTACH[] = "Menu.Analyzer.Attach";
+const char TraceFileExtension[] = ".qtd";
 
 } // namespace Constants
 } // namespace QmlProfiler