refactor: SelectField: remove _entryMap member

src/app/formulaire/elements/select/select-field.ts

@@ -36,11 +36,6 @@ export abstract class SelectField extends Field {
      */
     protected _messageWhenEmpty: string;
 
-    /**
-     * map id <-> select entry
-     */
-    protected _entryMap: { [key: string]: SelectEntry } = {};
-
     constructor(parent: FormulaireNode) {
         super(parent);
         this.clearEntries();
@@ -237,14 +232,21 @@ export abstract class SelectField extends Field {
     }
 
     protected createOrGetEntry(id: string, val: any, lbl?: string): SelectEntry {
-        let res: SelectEntry = this._entryMap[id];
+        let res = this.getEntryFromId(id);
         if (res === undefined) {
             res = new SelectEntry(id, val, lbl);
-            this._entryMap[id] = res;
         }
         return res;
     }
 
+    private getEntryFromId(id: string) {
+        for (const se of this._entries) {
+            if (se.id === id)
+                return se;
+        }
+        return undefined;
+    }
+
     public getEntryFromValue(val: any): SelectEntry {
         for (const se of this._entries) {
             if (se.value === val) {