Fix incorrect icons in ui files

chalk/plugins/viewplugins/screenshot/ksnapshotwidget.ui

@@ -60,7 +60,7 @@ The image can be dragged to another application or document to copy the full scr
                 <string>&amp;Save As...</string>
             </property>
             <property name="iconSet">
-                <iconset>"filesave"</iconset>
+                <iconset>"document-save"</iconset>
             </property>
             <property name="whatsThis" stdset="0">
                 <string>Click this button to save the current snapshot. To quickly save the snapshot without showing the file dialog, press Ctrl+Shift+S. The filename is automatically incremented after each save.</string>
@@ -91,7 +91,7 @@ The image can be dragged to another application or document to copy the full scr
                 <string>&amp;Print...</string>
             </property>
             <property name="iconSet">
-                <iconset>"fileprint"</iconset>
+                <iconset>"document-print"</iconset>
             </property>
             <property name="whatsThis" stdset="0">
                 <string>Click this button to print the current screenshot.</string>