[FIX] web_editor: align icon to the right

When replacing an image by a pictogram, the classes of the previous
media are copied to the new icon's `<span>`. This potentially includes
the `w-100` class which prevents the alignment from behaving correctly.

This commit removes the `w-100` class if it exists.

Steps to reproduce:
- Drop a "Media List" block
- Replace first image by pictogram.
- Align icon to the right.
=> Icon was displayed aligned to the left.

task-2829971 (was task-2729177)

closes odoo/odoo#95287

X-original-commit: https://github.com/odoo/odoo/commit/8f71a3c55dcaae738fbb673266aa400b4c4a1fa4
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>

addons/web_editor/static/src/components/media_dialog/image_selector.js

@@ -252,9 +252,11 @@ export class ImageSelector extends FileSelector {
         }));
     }
 }
+
 ImageSelector.mediaSpecificClasses = ['img', 'img-fluid', 'o_we_custom_image'];
 ImageSelector.mediaExtraClasses = [
     'rounded-circle', 'rounded', 'thumbnail', 'shadow', /^img-\S+$/,
+    'w-25', 'w-50', 'w-75', 'w-100',
 ];
 ImageSelector.tagNames = ['IMG'];
 ImageSelector.attachmentsListTemplate = 'web_editor.ImagesListTemplate';