Activate conda env if it runs in Windows

This fix was proposed originally by @msphan, but the master diverged.
I include it in this commit by cimply copy-pasting the relevant lines.
We could reproduce the bug separately, and in my case using omnipose.
The fix works for both of us.

Signed-off-by: Minh-Son  PHAN <minh-son.phan@pasteur.fr>

src/main/java/fiji/plugin/trackmate/cellpose/AbstractCellposeSettings.java

@@ -1,9 +1,12 @@
 package fiji.plugin.trackmate.cellpose;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 
+import ij.IJ;
+
 public abstract class AbstractCellposeSettings
 {
 
@@ -88,6 +91,14 @@ public List< String > toCmdLine( final String imagesDir )
  final String lastItem = split[ split.length - 1 ];
  if ( lastItem.toLowerCase().startsWith( "python" ) )
  {
+ // Activate conda env if it runs in Windows.
+ if ( IJ.isWindows() )
+ {
+ final String envname = split[ split.length - 2 ];
+ cmd.addAll( Arrays.asList( "cmd.exe", "/c", "conda", "activate", envname ) );
+ cmd.add( "&" );
+ }
+
  // Calling Cellpose from python.
  cmd.add( executablePath );
  cmd.add( "-m" );