Correction affichage edition

Signed-off-by: Gato <cedric@goutailler-olivier.fr>

src/app/issues/issue-detail/issue-detail.ts

@@ -58,6 +58,7 @@ export class IssueDetail {
   protected showAddDependency = false;
   protected selectedCandidateId: number | null = null;
   protected editingDescription = false;
+  private _descriptionBeforeEdit = '';
   protected showAddToEpic = false;
   protected selectedEpicCandidateId: number | null = null;
   protected showCreateInEpic = false;
@@ -237,6 +238,21 @@ export class IssueDetail {
     return !!this.issue.epic;
   }
 
+  protected startEditDescription(): void {
+    this._descriptionBeforeEdit = this.issue.description;
+    this.editingDescription = true;
+  }
+
+  protected async saveDescription(): Promise<void> {
+    this.editingDescription = false;
+    await this.saveIssue();
+  }
+
+  protected cancelEditDescription(): void {
+    this.issue.description = this._descriptionBeforeEdit;
+    this.editingDescription = false;
+  }
+
   protected onDescriptionPaste(event: ClipboardEvent): void {
     const ta = event.target as HTMLTextAreaElement;
     const start = ta.selectionStart;