Enter key selects emoji after ':' is typed

The previous behavior was that enter wouldn't select emojis until more
characters were typed after ':'. This was intentional in Change 241961,
but it is unclear why. Without a good reason we should make it select
emojis, if a reason becomes clear this change can be reverted.

Release-Notes: Enter key selects emoji after ':' is typed
Google-Bug-Id: b/261447630
Change-Id: I637ba5825dd79da1d0f2136ed34948718fc85710
diff --git a/polygerrit-ui/app/elements/shared/gr-textarea/gr-textarea.ts b/polygerrit-ui/app/elements/shared/gr-textarea/gr-textarea.ts
index dd08544..9f52517 100644
--- a/polygerrit-ui/app/elements/shared/gr-textarea/gr-textarea.ts
+++ b/polygerrit-ui/app/elements/shared/gr-textarea/gr-textarea.ts
@@ -357,12 +357,8 @@
   }
 
   private handleTabKey(e: KeyboardEvent) {
-    // Tab should have normal behavior if the picker is closed or if the user
-    // has only typed ':'.
-    if (
-      !this.isDropdownVisible() ||
-      (this.isEmojiDropdownActive() && this.currentSearchString === '')
-    ) {
+    // Tab should have normal behavior if the picker is closed.
+    if (!this.isDropdownVisible()) {
       return;
     }
     e.preventDefault();
@@ -372,12 +368,9 @@
 
   // private but used in test
   handleEnterByKey(e: KeyboardEvent) {
-    // Enter should have newline behavior if the picker is closed or if the user
-    // has only typed ':'. Also make sure that shortcuts aren't clobbered.
-    if (
-      !this.isDropdownVisible() ||
-      (this.isEmojiDropdownActive() && this.currentSearchString === '')
-    ) {
+    // Enter should have newline behavior if the picker is closed. Also make
+    // sure that shortcuts aren't clobbered.
+    if (!this.isDropdownVisible()) {
       this.indent(e);
       return;
     }
diff --git a/polygerrit-ui/app/elements/shared/gr-textarea/gr-textarea_test.ts b/polygerrit-ui/app/elements/shared/gr-textarea/gr-textarea_test.ts
index 634c387..1460246 100644
--- a/polygerrit-ui/app/elements/shared/gr-textarea/gr-textarea_test.ts
+++ b/polygerrit-ui/app/elements/shared/gr-textarea/gr-textarea_test.ts
@@ -617,19 +617,6 @@
       await element.updateComplete;
       assert.equal(element.text, '💯');
     });
-
-    test('enter key - ignored on just colon without more information', async () => {
-      const enterSpy = sinon.spy(element.emojiSuggestions!, 'getCursorTarget');
-      pressKey(element.textarea! as HTMLElement, Key.ENTER);
-      assert.isFalse(enterSpy.called);
-      element.textarea!.focus();
-      element.textarea!.selectionStart = 1;
-      element.textarea!.selectionEnd = 1;
-      element.text = ':';
-      await element.updateComplete;
-      pressKey(element.textarea! as HTMLElement, Key.ENTER);
-      assert.isFalse(enterSpy.called);
-    });
   });
 
   suite('gr-textarea monospace', () => {