feat : Portlet UI Cleanup - Merge Meeds-io/MIPs#81 (#87)

Before this fix, the new branding settings (radius) cannot be saved in interface
This is due to the override of the BrandingService configuration file
Then the new property about radius was not added on our side.
This commit add the property

digital-workplace-webapps/src/main/webapp/WEB-INF/conf/digital-workplace/branding-configuration.xml

@@ -70,6 +70,7 @@
         <value>${exo.branding.theme.tertiaryColor:tertiaryColor:#476A9C}</value>
         <value>${exo.branding.theme.greyColorLighten1:greyColorLighten1:#5f708a}</value>
         <value>${exo.branding.theme.textColor:textColor:#333333}</value>
+        <value>${exo.branding.theme.borderRadius:borderRadius:8px}</value>
       </values-param>
     </init-params>
   </component>