Fixed dawrf signals extended rendering

+Added SignalElements.isDwarf()
*Fixed dwarf signals being rendered as standard signals

src/components/map/object-renderers/SignalExtendedRenderer.js

@@ -95,6 +95,9 @@ function getHeadOffsetX(object) {
 }
 
 function getPoleLength(object, headOffsetX) {
+    const isDwarf = object.signal_elements.isDwarf();
+    if(isDwarf) return 0;
+    
     const isOverhead = object.signal_elements.isOverhead();
 
     let length = isOverhead ? 0 : 0.6;

src/model/signal-elements/signal-elements.js

@@ -23,6 +23,10 @@ export default class SignalElements {
         return this.headPosition === SignalElementsEnums.HeadPosition.UNKNOWN;
     }
 
+    isDwarf() {
+        return this.type === SignalElementsEnums.Type.DWARF || this.type === SignalElementsEnums.Type.DWARF_DOUBLE;
+    }
+
     static fromPrefabText(id, text) {
         const prefabName = text.split(",", 2)[0].trim();