Introduce workaround for bug in controlsfx

pom.xml

@@ -6,7 +6,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.github.hanseter</groupId>
     <artifactId>json-properties-fx</artifactId>
-    <version>2.0.0</version>
+    <version>1.0.17</version>
 
     <packaging>bundle</packaging>
     <name>JSON Properties Editor Fx</name>
@@ -35,12 +35,12 @@
 
 
     <properties>
-        <maven.compiler.source>21</maven.compiler.source>
-        <maven.compiler.target>21</maven.compiler.target>
-        <kotlin.compiler.jvmTarget>21</kotlin.compiler.jvmTarget>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+        <kotlin.compiler.jvmTarget>17</kotlin.compiler.jvmTarget>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <kotlin.version>2.0.10</kotlin.version>
-        <javafx.version>21.0.4</javafx.version>
+        <kotlin.version>1.9.20</kotlin.version>
+        <javafx.version>17.0.12</javafx.version>
         <slf4j.version>1.7.32</slf4j.version>
     </properties>
 
@@ -192,12 +192,7 @@
             <version>${slf4j.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.testfx</groupId>
-            <artifactId>openjfx-monocle</artifactId>
-            <version>21.0.2</version>
-            <scope>test</scope>
-        </dependency>
+
     </dependencies>
 
 </project>

src/main/kotlin/com/github/hanseter/json/editor/controls/EnumSetControl.kt

@@ -21,6 +21,10 @@ class EnumSetControl(
         while (c.next()) {
             //mill changes
         }
+        //checkbox model is buggy when there are two selected elements and the first one was deselected.
+        //even though this looks like a nop, it forces the checkbox model to "reload"
+        //should be this bug in controlsfx: https://github.com/controlsfx/controlsfx/issues/1550
+        c.list.forEach {  }
         controlChanged(c.list)
     }