Skeleton loading of issue title and description

Now that we have issue titles and descriptions updating in real-time, it seems like when first loading the page, the fields are pulled async-ly. So when the page loads, the fields are empty for a second, which is a bit weird UX-wise, because the elements on the page move around.

Can we load something in those fields with the initial HTML page load? There was some discussion earlier about this from a real-time perspective. For example, skeleton style loading was mentioned, i.e.: https://gitlab.com/gitlab-org/gitlab-ce/issues/29666.

Design

• Animate content jump when vertical height of actual content is not exactly the same as skeleton loading concept.
• Horizontal skeleton loading pulse animation