Reinstate ledmap on 2D

FX.h / FX_2Dfcn.cpp: 
- setUpMatrix with reset option (create 1:1 matrix) and customMappingTable[customMappingTable[x]] 

FX_fcn.cpp: 
- deserializeMap: also for 2D, use setUpMatrix

wled00/data/settings_um.htm

@@ -105,7 +105,7 @@
 		}
 	}
 	//WLEDMM util function
-	const initCap = (s) => {
+	function initCap(s) {
   		if (typeof s !== 'string') return ''
   		return s.charAt(0).toUpperCase() + s.slice(1)
 	}