Send button clicked twice

[flixi]

This is a serious flaud in our architecture. We need to ensure that a message is not doubly encrypted.

• if you hit the send button twice in a row, the message will become double encrypted
• firsst the message is encrypted and then that encrypted message gets encrypted again
• easy fix, just allow the script to perform only once, it doesn't matter how often the person on the other end hits the send button
• other possibility, grey out the composing window so do an overlay upon hiting the send button