[FIX] web_editor: prevent horizontal overflow of toolbar in website

Since the introduction of the strikethrough button, the text toolbar
overflowed website's sidebar. This reduces their size so they don't
overflow.

task-2758967

closes odoo/odoo#84190

X-original-commit: 896c64cdf74e5c602a92a28f95f79e20c08ffd87
Signed-off-by: David Monjoie (dmo) <dmo@odoo.com>
Signed-off-by: Antoine Guenet <age@odoo.com>

addons/web_editor/static/src/scss/wysiwyg_snippets.scss

@@ -510,8 +510,7 @@ body.editor_enable.editor_has_snippets {
             .btn {
                 @extend %we-generic-button;
                 display: flex;
-                padding-top: $o-we-sidebar-content-field-height * .12;
-                padding-bottom: $o-we-sidebar-content-field-height * .12;
+                padding: ($o-we-sidebar-content-field-height * .12) ($o-we-sidebar-content-field-button-group-button-spacing - 2);
             }
 
             we-customizeblock-option {