[IMP] web_editor: omit protocol in URL input field

Before this commit, when an existing link was edited with the LinkTools
or LinkDialog, the URL input field omitted the "mailto:" part of the URL
for email links, but displayed the protocol/scheme for http(s) links and
phone numbers (tel: or tel://).

This commit standardizes the behaviour of the referred input field such
that the protocol/scheme for http(s), mailto and tel URLs are omitted,
in order to have a cleaner UI.

task-3516854

Part-of: odoo/odoo#136487

addons/web_editor/static/src/js/wysiwyg/widgets/link.js

@@ -196,8 +196,8 @@ export class Link extends Component {
      */
     _setUrl({ shouldFocus } = {}) {
         if (this.state.url) {
-            var match = /mailto:(.+)/.exec(this.state.url);
-            this.$el.find('input[name="url"]').val(match ? match[1] : this.state.url);
+            const protocolLessUrl = this.state.url.replace(/^(https?|mailto|tel):(\/\/)?/i, '');
+            this.$el.find('input[name="url"]').val(protocolLessUrl);
             this._onURLInput();
             this._savedURLInputOnDestroy = false;
         }

addons/website/static/tests/tours/link_tools.js

@@ -285,7 +285,7 @@ wTourUtils.registerWebsitePreviewTour('link_tools', {
         content: "Check Link tools URL input content is up-to-date",
         trigger: "#o_link_dialog_url_input",
         run() {
-            if (this.$anchor[0].value !== 'http://callmemaybe.com/shop') {
+            if (this.$anchor[0].value !== 'callmemaybe.com/shop') {
                 throw new Error("Tour step failed");
             }
         }