Code maintenance for Qt 5:

- Replaced Qt::WFlags with Qt::WindowFlags.
- Removed path "QtCore/" and "QtGui/" from the includes.
- Replaced "QString::toAscii()" with "QString::toLatin1()".

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@6843 b45a01b8-16f6-495d-af2f-9b41ad6348cc

retroshare-gui/src/util/stringutil.cpp

@@ -310,7 +310,7 @@ bool
 string_is_hex(const QString &str)
 {
   for (int i = 0; i < str.length(); i++) {
-    char c = str[i].toUpper().toAscii();
+    char c = str[i].toUpper().toLatin1();
     if ((c < 'A' || c > 'F') && (c < '0' || c > '9'))
       return false;
   }