[FIX] web_editor: fix toolbar buttons alignment

This commit fixes the layout of icons and labels in the "AI",
"Animate", "Highlight" buttons of the text toolbar in Website edit mode.

Before this commit, there was too much space between the icon and the
label of the "AI" button and not enough space between the icon and the
label of the "Animate" and "Highlight" buttons.

task-3586280

closes odoo/odoo#141440

Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>

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

@@ -742,10 +742,6 @@
 
             #chatgpt {
                 grid-area: ai;
-
-                span {
-                    margin-left: 5px;
-                }
             }
             #animate {
                 grid-area: animate;
@@ -753,6 +749,11 @@
             #highlight {
                 grid-area: hilight;
             }
+            #chatgpt, #animate, #highlight {
+                .fa {
+                    margin-right: $o-we-item-spacing * 0.25;
+                }
+            }
 
             .dropdown-menu.colorpicker-menu {
                 min-width: 0;