Delay allowing sticky modes

On bootup aux channels start out at default and allow sticky modes right away,
although they should only be allowed once they are actually not active.

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src/test/unit/rc_controls_unittest.cc

@@ -224,6 +224,10 @@ extern "C" {
 uint32_t millis(void) {
     return fixedMillis;
 }
+
+uint32_t micros(void) {
+    return fixedMillis * 1000;
+}
 }
 
 void resetMillis(void) {