Create pull request template for new Issues.

.github/pull_request_template.md

@@ -0,0 +1,15 @@
+<h2>Steps to replicate</h2>
+
+[Please include screenshots, browser information, and anything else that can help us recreate the problem.]
+
+<h2>Result</h2>
+
+[What happened.]
+
+<h2>Expected</h2>
+
+[What you expected to happen.]
+
+* User report: [shortlink to chat/forum thread/ticket, ie #12345-hc]
+* Follow-up ticket: [shortlink to ticket, ie #12345-zd]
+* User's site: [link to user's site, including the specific page/post where issue is present]