[FIX] web_editor: fix width of SVG images in media dialog

This solves an issue with svg images from Isometric for example. The
media dialog assigns width to its displayed images thanks to the
flex-basis and flex-grow properties of their container, based on the
aspect ratio of each image. This was done correctly for SVG images too.
However, after assigning a nice space for a specific SVG image, the
image itself was not made to fill that assigned space... it only worked
if the natural width of the image was higher than the assigned space.
This was of course more obvious with SVG files with no intrinsic width
as they would simply not appear.

closes odoo/odoo#60305

X-original-commit: 585aed8b49b98d014db1e06c11e42b0d38a0b8c6
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>
Co-authored-by: qsm-odoo <qsm@odoo.com>

addons/web_editor/static/src/scss/wysiwyg.scss

@@ -224,7 +224,7 @@ body .modal {
                 @extend %o-preview-alpha-background;
 
                 &, > img {
-                    max-width: 100%;
+                    width: 100%;
                 }
             }