- Adds animation when opening & closing the sidebar
- Adds an animation when dragging boards to a new position
- Adds animations to dragging issues around

When opening the sidebar it will also animate the scrollLeft property to
make moving to the opened issue less blunt.

Closes #25630

Rather than constructing & then deconstructing, we know just hide & show
the sidebar. This is done so we dont' have a memory leak on the frontend
with objects getting created.

Changed return statement instead of if
Delete objects after issue is closed

Need to get working the subscription
Styling updates