Fix mavlink disconnection in pauses in cli commands

Implement pause function that proceeds processing mavlink.
Use temporal workaround for simulation, as micros function gives the same result on the same simulation step.

flix/cli.ino

@@ -52,6 +52,22 @@ void print(const char* format, ...) {
 #endif
 }
 
+void pause(float duration) {
+#if ARDUINO
+	double start = t;
+	while (t - start < duration) {
+		step();
+		handleInput();
+#if WIFI_ENABLED
+		processMavlink();
+#endif
+	}
+#else
+	// Code above won't work in the simulation
+	delay(duration * 1000);
+#endif
+}
+
 void doCommand(String str, bool echo = false) {
 	// parse command
 	String command, arg0, arg1;