[FIX] web: adapt the form view to large screens

Prior to this commit, there was a spacing issue in large screens (eg. 4K
screen), the form view wasn't large enough and this created a big gap
between the form view and the chatter.

This commit adapts the form view to large screens.

task-3453381
Part of task-3326263

closes odoo/odoo#136454

X-original-commit: 1a995cad898283f6909506ba43d1692381b3d6ef
Signed-off-by: Pierre Paridans (app) <app@odoo.com>

addons/mail/static/src/views/web/form/form_renderer.scss

@@ -8,12 +8,9 @@
     --ChatterTopbar-padding-right: #{$o-horizontal-padding};
 
     &.o-aside {
-        --Chatter-max-width: #{$o-form-view-sheet-max-width};
-
         flex-shrink: 0;
         flex-grow: 1;
         padding: map-get($spacers, 0);
-        max-width: var(--Chatter-max-width);
         width: $o-mail-Chatter-minWidth;
 
         .o-mail-Message.o-not-discussion {

addons/web/static/src/views/form/form.variables.scss

@@ -1,4 +1,5 @@
 $o-sheet-vpadding: $o-spacer * 1.5 !default;
 
+$o-form-renderer-max-width: 2600px !default;
 $o-form-view-sheet-max-width: 1534px !default;
 $o-form-picture-size: 90px !default;

addons/web/static/src/views/form/form_controller.scss

@@ -212,6 +212,10 @@
         }
     }
 
+    .o_form_renderer {
+        max-width: $o-form-renderer-max-width;
+    }
+
     // No sheet
     &.o_form_nosheet, .o_form_nosheet {
         // Since 16.3 the `o_form_nosheet` element acts as a sheet filling the