ClangTools: Move run settings to projects mode

Make the global run settings available per project in project mode and
thus remove the diagnostic config selection from the
selectable-files-dialog:

 * Extract the classes RunSettings and RunSettingsWidget instead of
   duplicating stuff.
 * Ensure to pick up the old settings
 * Add some convenience buttons/links in projects mode allowing to
   restore the global settings, to open the global settings and to
   navigate (back) to the analyzer mode.

Change-Id: I1b91b6f8e58a87a025774e4643c46e176b2a8885
Reviewed-by: Cristian Adam <cristian.adam@qt.io>
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>

src/plugins/clangtools/clangtoolruncontrol.h

@@ -26,6 +26,7 @@
 #pragma once
 
 #include "clangfileinfo.h"
+#include "clangtoolssettings.h"
 
 #include <cpptools/clangdiagnosticconfig.h>
 #include <cpptools/projectinfo.h>
@@ -66,7 +67,7 @@ class ClangToolRunWorker : public ProjectExplorer::RunWorker
 
 public:
     ClangToolRunWorker(ProjectExplorer::RunControl *runControl,
-                       const CppTools::ClangDiagnosticConfig &diagnosticConfig,
+                       const RunSettings &runSettings,
                        const FileInfos &fileInfos,
                        bool preventBuild);
 
@@ -93,15 +94,15 @@ private:
 
     void finalize();
 
-protected:
+private:
+    RunSettings m_runSettings;
+    CppTools::ClangDiagnosticConfig m_diagnosticConfig;
+    FileInfos m_fileInfos;
+
     ProjectBuilder *m_projectBuilder = nullptr;
     Utils::Environment m_environment;
     Utils::TemporaryDirectory m_temporaryDir;
 
-private:
-    CppTools::ClangDiagnosticConfig m_diagnosticConfig;
-    FileInfos m_fileInfos;
-
     CppTools::ProjectInfo m_projectInfoBeforeBuild;
     CppTools::ProjectInfo m_projectInfo;
     QString m_targetTriple;