App breaks when typing special char on value input

[johnnyasantoss]

Description of the Issue

When creating a channel, if you type a special character like "-" after adding any numbers, in the capacity input, the app breaks.

Steps to Reproduce

See the above.

Description of Your Setup

Browser & version: Waterfox G4.0.6 (64-bit)
Operating system: Linux 5.11 Manjaro
Node software & version: Node 16 LTS

Console Logs / Screenshots

Error: Invalid character
    a bn.js:6
    c bn.js:274
    _parseBase bn.js:310
    _init bn.js:105
    i bn.js:39
    getValueError index.tsx:177
    render index.tsx:106
    React 8
    unstable_runWithPriority scheduler.production.min.js:18
    React 10
    unstable_runWithPriority scheduler.production.min.js:18
    React 3
[react-dom.production.min.js:216:199](webpack://joule-extension/node_modules/react-dom/cjs/react-dom.production.min.js)
Uncaught Error: Invalid character
    a bn.js:6
    c bn.js:274
    _parseBase bn.js:310
    _init bn.js:105
    i bn.js:39
    getValueError index.tsx:177
    render index.tsx:106
    React 8
    unstable_runWithPriority scheduler.production.min.js:18
    React 10
    unstable_runWithPriority scheduler.production.min.js:18
    React 3