SAK-44158 Improve add and edit dialogs in Lessons (#8489) Reorder add content menu items and split into three columns. Removed scrolling attributes Set position back to default when opening, which is centered on the window. Set width to be the same as other modal windows when they open Move groups of configuration options into collapsible panels Made spacing more consistent Format stuff used by BLTI was in the page stuff section so it was never going to show. This moves it to its own section. Prereq and required settings were duplicated to a pagestuff section. This meant that non-page items that needed those settings couldn't access them this is now fixed. Fixed padding on input boxes, changed accordion buttons to links, fixed the left hand menu width and display.