Bug on EventListener attached to sendButton

[KossakowskaKarolina]

There are few issues with send button when the user sends the message:

• EventListener attached to sendButton changes button permanently. Button doesn't come back to it's original state. There is also text 'send' left, along with not working icon.
• It seems not to send message after first click. It just changes the look of the button, the second click sends the message (if the user didn't click on the icon - in that case message won't be sent either).
• There is difference in the look of the button whether the user sends message by clicking on the button or pressing the enter key (there are two seperated event listeners: on sendButton and on input - the latter one is triggered by pressing enter key).

After clicking button:

After pressing enter key: