Report finished state for concurrent jobs that don't support progress

Some concurrent jobs, like getting 'git blame' output, do not report
progress. Their the minimum and maximum of their progress range is
always 0, but they do report when they are finished. When such a job
finishes, we should make sure the progress bar indicates this.

Reviewed-by: con

src/plugins/coreplugin/progressmanager/futureprogress.cpp

@@ -197,6 +197,13 @@ bool FutureProgress::eventFilter(QObject *, QEvent *e)
 void FutureProgress::setFinished()
 {
     updateToolTip(m_watcher.future().progressText());
+
+    // Special case for concurrent jobs that don't use QFutureInterface to report progress
+    if (m_watcher.progressMinimum() == 0 && m_watcher.progressMaximum() == 0) {
+        m_progress->setRange(0, 1);
+        m_progress->setValue(1);
+    }
+
     if (m_watcher.future().isCanceled()) {
         m_progress->setError(true);
     } else {