Arts: MainWindow: Add menu icons.

src/View/ui/MainWindow.ui

@@ -425,11 +425,19 @@
    </property>
   </action>
   <action name="action_menu_edit_network">
+   <property name="icon">
+    <iconset>
+     <normaloff>ressources/network.png</normaloff>ressources/network.png</iconset>
+   </property>
    <property name="text">
     <string>Edit river network</string>
    </property>
   </action>
   <action name="action_menu_edit_geometry">
+   <property name="icon">
+    <iconset>
+     <normaloff>ressources/geometry.png</normaloff>ressources/geometry.png</iconset>
+   </property>
    <property name="text">
     <string>Edit geometry</string>
    </property>
@@ -443,6 +451,10 @@
    </property>
   </action>
   <action name="action_menu_boundary_conditions">
+   <property name="icon">
+    <iconset>
+     <normaloff>ressources/boundary_condition.png</normaloff>ressources/boundary_condition.png</iconset>
+   </property>
    <property name="text">
     <string>Boundary conditions and punctual contributions</string>
    </property>
@@ -451,16 +463,28 @@
    </property>
   </action>
   <action name="action_menu_initial_conditions">
+   <property name="icon">
+    <iconset>
+     <normaloff>ressources/initial_condition.png</normaloff>ressources/initial_condition.png</iconset>
+   </property>
    <property name="text">
     <string>Initial conditions</string>
    </property>
   </action>
   <action name="action_menu_edit_friction">
+   <property name="icon">
+    <iconset>
+     <normaloff>ressources/friction.png</normaloff>ressources/friction.png</iconset>
+   </property>
    <property name="text">
     <string>Edit friction</string>
    </property>
   </action>
   <action name="action_menu_edit_lateral_contribution">
+   <property name="icon">
+    <iconset>
+     <normaloff>ressources/lateral_contribution.png</normaloff>ressources/lateral_contribution.png</iconset>
+   </property>
    <property name="text">
     <string>Edit lateral contributions</string>
    </property>