Hide unnecessary elements in PR template and add description section

Author: Lamparter

.github/PULL_REQUEST_TEMPLATE.md

@@ -8,12 +8,23 @@ I ACKNOWLEDGE THE FOLLOWING BEFORE PROCEEDING:
 
 **Resolved / Related Issues**
 
-To prevent extra work, all changes to the Files codebase must link to an approved issue marked as `Ready to build`. Please insert the issue number following the hashtag with the issue number that this Pull Request resolves.
+<!--
+To prevent extra work, all changes to the Files codebase must link to an approved issue marked as `Ready to build`.
+Please insert the issue number following the hashtag with the issue number that this pull request resolves.
+-->
+
 - Closes #
 
 **Steps used to test these changes**
 
-Stability is a top priority for Files and all changes are required to go through testing before being merged into the repo. Please include a list of steps that you used to test this PR.
+<!--
+Stability is a top priority for Files and all changes are required to go through testing before being merged into the repo.
+Please include a list of steps that you used to test this PR.
+-->
 
 1. Opened Files ...
 2. ...
+
+---
+
+<!-- Write a detailed description of your changes here -->