CONFIG: disable runtimePostProcessing titleHack by default

- a leftover from much older VTK versions that had poor handling of
  the scalar bar text.

src/functionObjects/graphics/runTimePostProcessing/scalarBar.C

@@ -53,7 +53,7 @@ void Foam::functionObjects::runTimePostPro::scalarBar::clear()
     bold_ = true;
     shadow_ = false;
     italic_ = false;
-    titleHack_ = true;
+    titleHack_ = false;
     position_ = {0.8, 0.1};
     size_ = {0.1, 0.5};
     title_ = "";

src/functionObjects/graphics/runTimePostProcessing/scalarBar.H

@@ -42,7 +42,7 @@ Description
         bold        | Title in bold                         | no  | yes
         italic      | Title in italic font                  | no  | no
         shadow      | Title with shadowont                  | no  | no
-        titleHack   | Alternative placement strategy        | no  | yes
+        titleHack   | Alternative placement strategy        | no  | no
     \endtable
 
 Note