Customwizard: Handle unicode pecularities when capitalizing the first letter

Example: 'LATIN SMALL LETTER DZ' (U+01F3) is rendered as "dz".
The uppercase of that is 'LATIN CAPITAL LETTER DZ' (U+01F1), or "DZ".
The titlecase is 'LATIN CAPITAL LETTER D WITH SMALL LETTER Z' (U+01F2) "Dz",
which is what I would expect here when capitilizing the first letter.

Change-Id: If4fe342e310168dd6190034d4f1ceca4c2ef4a1a
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>

src/plugins/projectexplorer/customwizard/customwizardparameters.cpp

@@ -890,7 +890,7 @@ bool replaceFieldHelper(ValueStringTransformation transform,
         case 'c': // Capitalize first letter.
             replacement = it.value();
             if (!replacement.isEmpty())
-                replacement[0] = replacement.at(0).toUpper();
+                replacement[0] = replacement.at(0).toTitleCase();
             break;
         default:
             break;