extendet error handling for game table styles. every missing field or picture will be filled up by default style.

src/gui/qt/resources/pokerth.qrc

@@ -49,6 +49,7 @@
         <file>text-html.png</file>
         <file>text-plain.png</file>
         <file>document-open-folder.png</file>
+        <file>emblem-important.png</file>
     </qresource>
     <qresource prefix="/cflags">
         <file>cflags/ad.png</file>