Multiple fixes

- increase WLED_MAX_BUSSES for C3 (fixes #4215)
- fix for #4228
- fix for very long running effect (strip.now, strip.timebase)
- C++ API change to allow `seg.setColor().setOpacity()`

wled00/button.cpp

@@ -215,6 +215,7 @@ void handleAnalog(uint8_t b)
         briLast = bri;
         bri = 0;
       } else {
+        if (bri == 0) strip.restartRuntime();
         bri = aRead;
       }
     } else if (macroDoublePress[b] == 249) {