This is one step closer to making the transition to .vue files for issue boards

This was caused by the window being zoomed & therefore returning a
non-rounded number. The number now gets rounded to correctly work in the
if statement

Closes #29576

Moved the issue boards card template into the JS. This helps to improve
the code coverage & will eventually make it easier to move this to .vue
files

Fixed users href path being incorrect

expand remaining non-explicit eslint-disable blocks and factor out globals when no-undef encountered

When a board has a lot of lists & issues scrolling stops the user from moving the issue to the lsat list (or any list not on screen). This changes that by making the scrollable element the board-list element. This will need re-thinking when sorting in lists is possible.

Currently it just appends the new issue to the end of list & then sorts by priority which can cause some strange effects. For example if you drag the issue to the top of the list & then vue re-renders, the issue actually goes to the bottom.

Closes #24654

Stop issue being dragged if it doesn't have an ID

This was causing issues with moving from the done list

Fixed issue when dragging cards

Closes #21219

Closes #22092

Only visible when scrollable area is larger than height

Fixes issue with cursor not changing when dragging

Updated some parts based on feedback