More Assignments added

• Added Dimensius Mythic assignments. There's a lot.

• Included raidplan images on some Dimensius assignments, please do leave feedback on that!

• Northern Sky Soul Hunters Dispel assignment has been updated, removing the need of a million personal notes.

Assignment features

• Improved the dropdown menu when clickin an assignment row to assign people

• Clear overview of Assigned, Available, and custom lists (melee/range/dps/healers/split etc)

• Sorted by role, then alphabetical

• No longer jumps to bottom when you assign a player

• Collapsible box to toggle visibility of specific assignments

• MRT Preview is now hidden by default; click to view (saves vertical space)