Tab Window
Add emoji.json to installation directory
Read the JSON data from code
Filter emojis according to categories
Insert Emoji at cursor position
Toolbar control

Change-Id: Ia5a577ce41398132872914ebfa499e4d4077d57e
Reviewed-on: https://gerrit.libreoffice.org/26700Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Akshay Deep <akshaydeepiitr@gmail.com>
Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>