Fix hardcoded rule preventing editing most instrument name boxes

There was a hardcoded rule in the text_edit code from when layer IDs were still >100. I have no clue why this is the case, but something may be implemented differently in the layer name boxes than the other text boxes. In any case, this is something else to keep in mind in case IDs have to be rearranged again. >_>

Author: Bentroen

scripts/draw_text_edit/draw_text_edit.gml

@@ -506,7 +506,7 @@ function draw_text_edit(argument0, argument1, argument2, argument3, argument4, a
 	    for (l = text_start[i]*!singleline; l < text_lines[i]; l += 1) {
 	        ly = l - text_start[i]*!singleline  // Current line y value
 	        if ((ly + 1) * lh > h) break  // Exit if beyond box
-	        if (window = 0 || i < 100) && ((mouseover && text_select = -1) || text_select = i) {
+	        if (window = 0 || i < 400) && ((mouseover && text_select = -1) || text_select = i) {
 	            if (l = text_lines[i] - 1) hh = h - ly * lh
 	            else hh = lh
 	            if ((mouse_x >= xx || text_select = i) &&