*: web_editor, website_blog
This commit improves the mobile preview of websites. A mobile phone
image has been added around the iframe during the mobile preview. This
image was already used for the themes mobile preview, this is why the
css code has been unified to be used in these 2 mobile previews.
Parallel to this commit, we have modified the websites displayed in the
iframe of the preview of the themes so that the scrollbar of these is
visible (before it was hidden behind the image of the phone) but with a
smaller width in mobile mode.
This commit also improves the button to switch to mobile preview by
coloring it green when mobile preview is active.
task-2890050
closesodoo/odoo#98061
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>