CMakeProjectManager: Use the "gear" as project root item icon overlay

Replace and remove the pixel accumulation called "projectexplorer.png".

Fixes: QTCREATORBUG-25397
Change-Id: Idbf5e634bbe98d6eb9cc2cbaafd7f631cac18a83
Reviewed-by: Cristian Adam <cristian.adam@qt.io>
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/cmakeprojectmanager/cmakeprojectnodes.cpp

@@ -31,6 +31,7 @@
 #include <android/androidconstants.h>
 #include <coreplugin/fileiconprovider.h>
 #include <ios/iosconstants.h>
+#include <projectexplorer/projectexplorerconstants.h>
 #include <projectexplorer/target.h>
 
 #include <utils/qtcassert.h>
@@ -71,7 +72,9 @@ CMakeProjectNode::CMakeProjectNode(const Utils::FilePath &directory) :
     ProjectExplorer::ProjectNode(directory)
 {
     setPriority(Node::DefaultProjectPriority + 1000);
-    setIcon(QIcon(":/projectexplorer/images/projectexplorer.png")); // TODO: Use proper icon!
+    static const QIcon productIcon = Core::FileIconProvider::directoryIcon(
+                ProjectExplorer::Constants::FILEOVERLAY_PRODUCT);
+    setIcon(productIcon);
     setListInProject(false);
 }
 

src/plugins/projectexplorer/projectexplorer.qrc

@@ -8,7 +8,6 @@
         <file>images/mode_project@2x.png</file>
         <file>images/mode_project_mask.png</file>
         <file>images/mode_project_mask@2x.png</file>
-        <file>images/projectexplorer.png</file>
         <file>images/buildhammerhandle.png</file>
         <file>images/buildhammerhandle@2x.png</file>
         <file>images/buildhammerhead.png</file>

src/tools/iconlister/iconlister.cpp

@@ -334,8 +334,6 @@ void IconLister::addProjectExplorerIcons()
 
         {QIcon(":/projectexplorer/images/category_buildrun.png"), "category_buildrun.png", prefix,
          ""},
-        {QIcon(":/projectexplorer/images/projectexplorer.png"), "projectexplorer.png", prefix,
-         ""},
         {QIcon(":/projectexplorer/images/session.png"), "session.png", prefix,
          ""},
         {QIcon(":/projectexplorer/images/BuildSettings.png"), "BuildSettings.png", prefix,