Increase start server map limit in Team Arena ui to match q3_ui

Allow reading more scripts/*.arena files and allow up to 1024 maps
instead of 128.

code/ui/ui_local.h

@@ -611,7 +611,7 @@ typedef struct {
 #define MAX_HEADNAME  32
 #define MAX_TEAMS 64
 #define MAX_GAMETYPES 16
-#define MAX_MAPS 128
+#define MAX_MAPS MAX_ARENAS
 #define MAX_SPMAPS 16
 #define PLAYERS_PER_TEAM 5
 #define MAX_PINGREQUESTS		32