[FIX] OdooWebsiteEditor: allow the main zone to stretch vertically

Author: Goaman

packages/bundle-odoo-website-editor/OdooWebsiteEditor.ts

@@ -138,13 +138,13 @@ export class OdooWebsiteEditor extends JWEditor {
         const defaultTemplate = `
         <t-dialog><t t-zone="default"/></t-dialog>
         <div class="wrap_editor d-flex flex-column">
-            <div class="d-flex flex-row overflow-auto">
+            <div class="d-flex flex-grow-1 flex-row overflow-auto">
                 <t t-zone="main_sidebar"/>
                 <div class="d-flex flex-column overflow-auto o_editor_center">
                     <div class="o_toolbar">
                         <t t-zone="tools"/>
                     </div>
-                    <div class="d-flex overflow-auto">
+                    <div class="d-flex flex-grow-1 overflow-auto">
                         <t t-zone="snippetManipulators"/>
                         <t t-zone="main"/>
                     </div>