UI: separates app module, fixes in file lists

src/connection.h

@@ -6,7 +6,7 @@
 #include "main.h"
 #include <widget.h>
 
-void connect_to_server(w_app_t *params);
+void connect_to_server(app_t *params);
 void init_params(params_t *restrict);
 void clear_params(params_t *params);
 void get_ip_port(params_t *params, char *ip, char *port);