[10.0][IMP][web_responsive] Make search bar sticky (#633)

* Initial commit

* Initial commit

web_responsive/static/src/less/main.less

@@ -50,11 +50,13 @@ main {
         overflow: auto;
         > .o_main_content {
             overflow: initial;
+            @media (max-width: @screen-xs-max) {
                 > .o_content {
                     overflow: initial;
                 }
             }
         }
+    }
 }
 
 // Remove z-index from CP buttons so it doesn't overlap the menu