Rules: make WindowRole matching case sensitive

required by KWindowInfo forwarding
BUG: 343709
FIXED-IN: 5.2.1
REVIEW: 122407

rules.cpp

@@ -141,7 +141,7 @@ void Rules::readFromCfg(const KConfigGroup& cfg)
         description = cfg.readEntry("description");
     READ_MATCH_STRING(wmclass, .toLower().toLatin1());
     wmclasscomplete = cfg.readEntry("wmclasscomplete" , false);
-    READ_MATCH_STRING(windowrole, .toLower().toLatin1());
+    READ_MATCH_STRING(windowrole, .toLatin1());
     READ_MATCH_STRING(title,);
     READ_MATCH_STRING(clientmachine, .toLower().toLatin1());
     types = NET::WindowTypeMask(cfg.readEntry<uint>("types", NET::AllTypesMask));