FileName: Support "~ -> homePath" substitution

Change-Id: Ie1ca69582cfd8893b0616e51d2d5c1b13e987b69
Reviewed-by: Daniel Teske <daniel.teske@digia.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/libs/utils/fileutils.cpp

@@ -480,7 +480,10 @@ FileName FileName::fromString(const QString &filename)
 /// \a fileName is only passed through QDir::cleanPath
 FileName FileName::fromUserInput(const QString &filename)
 {
-    return FileName(QDir::cleanPath(filename));
+    QString clean = QDir::cleanPath(filename);
+    if (clean.startsWith(QLatin1String("~/")))
+        clean = QDir::homePath() + clean.midRef(1);
+    return FileName(clean);
 }
 
 FileName::FileName(const QString &string)