Added emoji support for composer

• Added:
- emoji support for composer
- new emoji sheet

• Updated:
- Textarea to accomodate
- Reducers and actions to retrieve caretPosition on text change when typing

• Removed:
- Unused input type on AutosuggestTextbox
- Old emoji sheet.png

app/javascript/gabsocial/components/popover/emoji_picker_popover.js

@@ -35,7 +35,7 @@ const messages = defineMessages({
 const assetHost = process.env.CDN_HOST || ''
 let EmojiPicker, Emoji // load asynchronously
 
-const backgroundImageFn = () => `${assetHost}/emoji/sheet.png`
+const backgroundImageFn = () => `${assetHost}/emoji/sheet_1.png`
 const listenerOptions = detectPassiveEvents.hasSupport ? { passive: true } : false
 
 const perLine = 8
@@ -223,7 +223,7 @@ const mapDispatchToProps = (dispatch) => ({
 
   onPickEmoji: (emoji) => {
     dispatch(useEmoji(emoji))
-    dispatch(insertEmojiCompose(0, emoji, false))
+    dispatch(insertEmojiCompose(emoji, false))
   },
 })