Restart DMA on channel enable/disable

Author: macaba

source/TS.NET/Drivers/Libtslitex/Thunderscope.cs

@@ -648,6 +648,10 @@ private void SetChannelEnable(int channelIndex, bool enabled, bool updateFronten
         {
             CheckOpen();
 
+            var restart = running;
+            if (restart)
+                Stop();
+
             var tsChannel = new Interop.tsChannelParam_t();
             var retVal = Interop.GetChannelConfig(tsHandle, (uint)channelIndex, out tsChannel);
 
@@ -667,6 +671,9 @@ private void SetChannelEnable(int channelIndex, bool enabled, bool updateFronten
             if (updateFrontends)
                 UpdateFrontends();
 
+            if (restart)
+                Start();
+
             GetAcquisitionConfig();     // Update cachedAdcChannelMode
         }