truncation/association/dissocation points are represented as a dot

CHANGELOG

 minerva (15.0.0~beta.5) unstable; urgency=medium
+  * Backward incompatible: truncation/association/dissocation points are
+    represented as a dot in all new images/uploaded maps (#1265)
   * Bug fix: export to GPML uses proper arrow types (#1262)
   * Bug fix: export to GPML uses dashed lines in reactions when possible
     (#1262)

converter-graphics/src/main/java/lcsb/mapviewer/converter/graphics/bioEntity/reaction/ReactionConverter.java

@@ -359,7 +359,8 @@ public class ReactionConverter extends BioEntityConverter<Reaction> {
       // bigger connecting point circles in SBGN view
       if (sbgnFormat) {
         radius *= SBGN_RADIUS_MULTIPLIER;
-      } else if (operator instanceof AndOperator || operator instanceof SplitOperator) {
+      } else if (operator instanceof AndOperator || operator instanceof SplitOperator
+          || operator instanceof DissociationOperator || operator instanceof AssociationOperator || operator instanceof TruncationOperator) {
         radius = 1.5;
         fillColor = operator.getLine().getColor();
       }

model/src/main/java/lcsb/mapviewer/model/map/reaction/AssociationOperator.java

@@ -50,7 +50,7 @@ public class AssociationOperator extends NodeOperator {
 
   @Override
   public String getOperatorText() {
-    return "&";
+    return "";
   }
 
   @Override

model/src/main/java/lcsb/mapviewer/model/map/reaction/DissociationOperator.java

@@ -49,7 +49,7 @@ public class DissociationOperator extends NodeOperator {
 
   @Override
   public String getOperatorText() {
-    return "○";
+    return "";
   }
 
   @Override