Fix the emoticon editor page

It wasn't possible to edit the shortcode or description anymore, because
signals weren't hooked up. I also added a separator to help separate
some of these controls visually.

(cherry picked from commit 4e616d53b2)

src/settings/EmoticonEditorPage.qml

@@ -99,12 +99,15 @@ FormCard.FormCardPage {
             id: shortcode
             label: i18n("Shortcode:")
             text: root.shortcode
+            onTextChanged: root.shortcode = text
         }
         FormCard.FormTextFieldDelegate {
             id: description
             label: i18n("Description:")
             text: root.description
+            onTextChanged: root.description = text
         }
+        FormCard.FormDelegateSeparator {}
         FormCard.FormButtonDelegate {
             id: save
             text: i18n("Save")