PreviewWidget.ui: Remove unneeded direct specification of resource.qrc

src/Gui/ui/PreviewWidget.ui

@@ -188,7 +188,7 @@
          <string/>
         </property>
         <property name="icon">
-         <iconset resource="../../../../resources.qrc">
+         <iconset>
           <normaloff>:/images/previous_frame</normaloff>:/images/previous_frame</iconset>
         </property>
         <property name="iconSize">
@@ -229,7 +229,7 @@
          <string/>
         </property>
         <property name="icon">
-         <iconset resource="../../../../resources.qrc">
+         <iconset>
           <normaloff>:/images/play</normaloff>:/images/play</iconset>
         </property>
         <property name="iconSize">
@@ -270,7 +270,7 @@
          <string/>
         </property>
         <property name="icon">
-         <iconset resource="../../../../resources.qrc">
+         <iconset>
           <normaloff>:/images/next_frame</normaloff>:/images/next_frame</iconset>
         </property>
         <property name="iconSize">
@@ -311,7 +311,7 @@
          <string/>
         </property>
         <property name="icon">
-         <iconset resource="../../../../resources.qrc">
+         <iconset>
           <normaloff>:/images/stop</normaloff>:/images/stop</iconset>
         </property>
         <property name="iconSize">
@@ -361,7 +361,7 @@
          <string/>
         </property>
         <property name="icon">
-         <iconset resource="../../../../resources.qrc">
+         <iconset>
           <normaloff>:/images/marker_start</normaloff>:/images/marker_start</iconset>
         </property>
         <property name="iconSize">
@@ -402,7 +402,7 @@
          <string/>
         </property>
         <property name="icon">
-         <iconset resource="../../../../resources.qrc">
+         <iconset>
           <normaloff>:/images/marker_stop</normaloff>:/images/marker_stop</iconset>
         </property>
         <property name="iconSize">
@@ -443,7 +443,7 @@
          <string/>
         </property>
         <property name="icon">
-         <iconset resource="../../../../resources.qrc">
+         <iconset>
           <normaloff>:/images/editcut</normaloff>:/images/editcut</iconset>
         </property>
         <property name="iconSize">