Project: Move signalling of parsing state into Project

Get rid of duplicated code to do such signaling in derived Project types.

Change-Id: I26914a1d751d72ee65c15a7943e0e7f34978f042
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/plugins/nim/project/nimproject.cpp

@@ -127,6 +127,7 @@ void NimProject::collectProjectFiles()
 
 void NimProject::updateProject()
 {
+    emitParsingStarted();
     const QStringList oldFiles = m_files;
     m_files.clear();
 
@@ -152,7 +153,7 @@ void NimProject::updateProject()
     newRoot->setDisplayName(displayName());
     newRoot->addNestedNodes(fileNodes);
     setRootProjectNode(newRoot);
-    emit parsingFinished();
+    emitParsingFinished(true);
 }
 
 bool NimProject::supportsKit(Kit *k, QString *errorMessage) const