Crash on change in focus

[kaxxa123]

Occasionally the Merkle UI is crashing as we change focus from one UI element to another.

> [email protected] start
> node ./build/src/index.js

TypeError: done is not a function
    at Textarea._listener (/...../zkyes-smt/merkle/node_modules/blessed/lib/widgets/textarea.js:231:5)
    at Textbox._listener (/...../zkyes-smt/merkle/node_modules/blessed/lib/widgets/textbox.js:43:15)
    at EventEmitter._emit (/...../zkyes-smt/merkle/node_modules/blessed/lib/events.js:98:20)
    at EventEmitter.emit (/...../zkyes-smt/merkle/node_modules/blessed/lib/events.js:117:12)
    at Form.<anonymous> (/...../zkyes-smt/merkle/node_modules/blessed/lib/widgets/form.js:43:14)
    at EventEmitter._emit (/...../zkyes-smt/merkle/node_modules/blessed/lib/events.js:94:20)
    at EventEmitter.emit (/...../zkyes-smt/merkle/node_modules/blessed/lib/events.js:131:12)
    at Program.<anonymous> (/...../zkyes-smt/merkle/node_modules/blessed/lib/widgets/screen.js:602:15)
    at Program.emit (node:events:517:28)
    at /...../zkyes-smt/merkle/node_modules/blessed/lib/program.js:410:15
```