Inline getSaveButtonLabel

Save button is never rendered when editing is false.

Release-Notes: skip
Google-bug-id: b/242982372
Change-Id: I0a7b6738ae04ffb66716b5dd49b1fa099872148e

polygerrit-ui/app/elements/shared/gr-comment/gr-comment.ts

diff --git a/polygerrit-ui/app/elements/shared/gr-comment/gr-comment.ts b/polygerrit-ui/app/elements/shared/gr-comment/gr-comment.ts
index e96c8fe..7eecc23 100644
--- a/polygerrit-ui/app/elements/shared/gr-comment/gr-comment.ts
+++ b/polygerrit-ui/app/elements/shared/gr-comment/gr-comment.ts
@@ -834,7 +834,7 @@
         ?disabled=${this.isSaveDisabled()}
         class="action save"
         @click=${this.handleSaveButtonClicked}
-        >${this.getSaveButtonLabel()}</gr-button
+        >${this.permanentEditingMode ? 'Preview' : 'Save'}</gr-button
       >
     `;
   }
@@ -1066,11 +1066,6 @@
     });
   }
 
-  private getSaveButtonLabel() {
-    if (!this.permanentEditingMode) return 'Save';
-    return this.editing ? 'Preview' : 'Edit';
-  }
-
   private handleSaveButtonClicked() {
     if (!this.permanentEditingMode) this.save();
     else this.editing = !this.editing;