ProjectExplorer: Fix translation issues

Add missing Q_OBJECT macro, use sensible contexts, and use "simpler"
namespace resolution (for QTBUG-64007)

Change-Id: I2417a7a40e8ba0ff4bfdff34d2a4c57d8dcdeb00
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>

src/plugins/projectexplorer/applicationlauncher.cpp

@@ -57,9 +57,11 @@
 */
 
 using namespace Utils;
-using namespace ProjectExplorer::Internal;
 
 namespace ProjectExplorer {
+
+using namespace Internal;
+
 namespace Internal {
 
 enum State { Inactive, Run };

src/plugins/projectexplorer/projectwelcomepage.cpp

@@ -233,7 +233,10 @@ protected:
 class SessionDelegate : public BaseDelegate
 {
 protected:
-    QString entryType() override { return tr("session", "Appears in \"Open session <name>\""); }
+    QString entryType() override
+    {
+        return ProjectWelcomePage::tr("session", "Appears in \"Open session <name>\"");
+    }
     QRect toolTipArea(const QRect &itemRect, const QModelIndex &idx) const override
     {
         // in expanded state bottom contains 'Clone', 'Rename', etc links, where the tool tip
@@ -413,7 +416,10 @@ private:
 
 class ProjectDelegate : public BaseDelegate
 {
-    QString entryType() override { return tr("project", "Appears in \"Open project <name>\""); }
+    QString entryType() override
+    {
+        return ProjectWelcomePage::tr("project", "Appears in \"Open project <name>\"");
+    }
     int shortcutRole() const override { return ProjectModel::ShortcutRole; }
 
 public:

src/plugins/projectexplorer/runconfiguration.cpp

@@ -988,9 +988,9 @@ void RunControlPrivate::onWorkerStarted(RunWorker *worker)
         continueStart();
         return;
     }
-    showError(tr("Unexpected run control state %1 when worker %2 started.")
-              .arg(stateName(state))
-              .arg(worker->d->id));
+    showError(RunControl::tr("Unexpected run control state %1 when worker %2 started.")
+                  .arg(stateName(state))
+                  .arg(worker->d->id));
 }
 
 void RunControlPrivate::onWorkerFailed(RunWorker *worker, const QString &msg)
@@ -1576,14 +1576,14 @@ void RunWorkerPrivate::timerEvent(QTimerEvent *ev)
         if (startWatchdogCallback)
             startWatchdogCallback();
         else
-            q->reportFailure(tr("Worker start timed out."));
+            q->reportFailure(RunWorker::tr("Worker start timed out."));
         return;
     }
     if (ev->timerId() == stopWatchdogTimerId) {
         if (stopWatchdogCallback)
             stopWatchdogCallback();
         else
-            q->reportFailure(tr("Worker stop timed out."));
+            q->reportFailure(RunWorker::tr("Worker stop timed out."));
         return;
     }
 }

src/plugins/projectexplorer/runconfiguration.h

@@ -517,6 +517,8 @@ private:
 
 class PROJECTEXPLORER_EXPORT SimpleTargetRunner : public RunWorker
 {
+    Q_OBJECT
+
 public:
     explicit SimpleTargetRunner(RunControl *runControl);