do not restart effects after LEDs off/on

wled00/FX.h

@@ -895,7 +895,7 @@ class WS2812FX {  // 96 bytes
       purgeSegments(bool force = false),
       setSegment(uint8_t n, uint16_t start, uint16_t stop, uint8_t grouping = 1, uint8_t spacing = 0, uint16_t offset = UINT16_MAX, uint16_t startY=0, uint16_t stopY=1),
       setMainSegmentId(uint8_t n),
-      restartRuntime(),
+      restartRuntime(bool doReset=true),
       resetSegments(bool boundsOnly = false), //WLEDMM add boundsOnly
       makeAutoSegments(bool forceReset = false),
       fixInvalidSegments(),

wled00/FX_fcn.cpp

@@ -2281,8 +2281,14 @@ void WS2812FX::setSegment(uint8_t n, uint16_t i1, uint16_t i2, uint8_t grouping,
   _segments[n].setUp(i1, i2, grouping, spacing, offset, startY, stopY);
 }
 
-void WS2812FX::restartRuntime() {
-  for (segment &seg : _segments) {seg.markForReset(); seg.resetIfRequired();}
+void WS2812FX::restartRuntime(bool doReset) {
+  for (segment &seg : _segments) {
+    if (doReset) {   // WLEDMM we prefer not to perform a complete restart of all effects
+      seg.markForReset(); seg.resetIfRequired(); 
+    } else {
+      seg.next_time = 0; seg.step = 0;
+    }
+  }
 }
 
 void WS2812FX::resetSegments(bool boundsOnly) { //WLEDMM add boundsonly

wled00/button.cpp

@@ -189,7 +189,7 @@ void handleAnalog(uint8_t b)
         briLast = bri;
         bri = 0;
       } else {
-        if (bri == 0) strip.restartRuntime();
+        if (bri == 0) strip.restartRuntime(false);
         bri = aRead;
       }
     } else if (macroDoublePress[b] == 249) {

wled00/led.cpp

@@ -58,7 +58,7 @@ void toggleOnOff()
   if (bri == 0)
   {
     bri = briLast;
-    strip.restartRuntime();
+    strip.restartRuntime(false);
   } else
   {
     briLast = bri;