Replace tribute with text-expander-element for textarea (#23985)

The completion popup now behaves now much more as expected than before
for the raw textarea:
- You can press <kbd>Tab</kbd> or <kbd>Enter</kbd> once the completion
popup is open to accept the selected item
- The menu does not close automatically when moving the cursor
- When you delete text, previously correct suggestions are shown again
- If you delete all text until the opening char (`@` or `:`) after
applying a suggestion, the popup reappears again
- Menu UI has been improved

<img width="278" alt="Screenshot 2023-04-07 at 19 43 42"
src="https://user-images.githubusercontent.com/115237/230653601-d6517b9f-0988-445e-aa57-5ebfaf5039f3.png">

web_src/css/form.css

@@ -1,3 +1,20 @@
+.ui.input textarea,
+.ui.form textarea,
+.ui.form input:not([type]),
+.ui.form input[type="date"],
+.ui.form input[type="datetime-local"],
+.ui.form input[type="email"],
+.ui.form input[type="number"],
+.ui.form input[type="password"],
+.ui.form input[type="search"],
+.ui.form input[type="tel"],
+.ui.form input[type="time"],
+.ui.form input[type="text"],
+.ui.form input[type="file"],
+.ui.form input[type="url"] {
+  transition: none;
+}
+
 input,
 textarea,
 .ui.input > input,