[MIG] web_chatter_position: Migration to 13.0

web_chatter_position/static/src/scss/chatter_position.scss

@@ -1,5 +1,5 @@
 $chatter_zone_width: 35%;
-
+$o-form-view-sheet-max-width: 1140px !default;
 // Size of labels
 .o_web_client {
     &.o_chatter_position_sided {
@@ -262,9 +262,26 @@ $chatter_zone_width: 35%;
             display: none;
         }
     }
+    .o_chatter_position_bottom & {
+        .o_form_view {
+            flex-flow: column;
+            height: auto;
+            .o_form_sheet_bg {
+                width: 100%;
+            }
 
+            .oe_chatter {
+                width: 100%;
+                padding: 16px 16px 48px;
+            }
+        }
+    }
     // Sided chatter, if user wants
     .o_chatter_position_sided & {
+        .o_chatter {
+            flex: 0 0 35%;
+            overflow: auto;
+        }
         @include media-breakpoint-up(lg) {
             .o_form_view:not(.o_form_nosheet) {
                 display: flex;