DLG Game Master Additions

Client-side quality-of-life additions for the Arma Reforger Game Master editor. 

Initial release adds sorting and filtering to the entity list of the current layer in the compact panel.

- Name search: a search box filters the entity list live while you type. Players are matched by player name, everything else by the name shown on the tile.
- Sort modes: Default order, Name A-Z, Name Z-A, Nearest first, Farthest first, By faction, Damaged first. Distance is measured from the editor camera.
- Faction filter: show all factions, a single faction of the scenario, or only entities without a faction.
- Nested entities: a single button to decompose listed groups into single entities
- Works with the vanilla type tabs: All, Characters, Groups, Vehicles, Tasks, Objects and Systems combine with the search and faction filter.
- Shared state: search text, sort mode and faction stay in sync between the compact panel and the dialog, and persist while the game is running.
- Paging stays correct: the page count follows the filtered result, and the current page is clamped when the result shrinks.
- Script only: no layout, prefab or config overrides, so it is compatible with other Game Master mods that don't touch the entity list. Dependency: Arma Reforger only.