Hide Button Text
There is a simple, but genius, method to replace button with icon. I learned it from jQuery. First, create the button, as you would always do. You can use <button>...
First, run the following script. Second, execute provided commands.
mysql --database=db_name -u db_username -p -B -N -e "SHOW TABLES" | awk '{print "ALTER TABLE", $1, "CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;"}'