FEATURE: Do encodeURI on share links

Some Discourse-supported sharing platforms such as Twitter are unable to determine the end of a unicode URL. If you post a URL "https://example.org/t/测试/1" on Twitter, it will be a link of href="https://example.org/t/"

If the URL contains any unicode character (usually in the slug part) , it must be urlencoded with encodeURI(url) before being passed to source.generateUrl(link, title), or it will be a malformed URL in the sharing tweet.

app/assets/javascripts/discourse/components/share-popup.js.es6

@@ -81,7 +81,7 @@ export default Ember.Component.extend({
     if (!this.site.mobileView) {
       $this.css({ left: "" + x + "px" });
     }
-    this.set("link", url);
+    this.set("link", encodeURI(url));
     this.set("visible", true);
 
     Ember.run.scheduleOnce("afterRender", this, this._focusUrl);