fix(MultiFunctionButton): fix width bug, update test and story

[laraIsmael]

• [ ] 🖼 Image Snapshot coverage

• [ ] 👾 Browsers tested

  • [ ] Chrome
  • [ ] Firefox
  • [ ] Safari
  • [ ] IE11

[github-actions[bot]]

Coverage report

Total coverage

Status	Category	Percentage	Covered / Total
🟢	Statements	94.75%	7333/7739
🟡	Branches	87.07%	4667/5360
🟢	Functions	93.54%	2113/2259
🟢	Lines	95.32%	7091/7439

Status of coverage: 🟢 - ok, 🟡 - slightly more than threshold, 🔴 - under the threshold

Show files with reduced coverage 🔻

### Reduced coverage | Status | Filename | Statements | Branches | Functions | Lines | | :----: | :-------------------------------------------- | :--------- | :----------------- | :-------- | :---- | | 🟢 | components/src/Button/MultiFunctionButton.tsx | 100% | 85.71% (-4.76% 🔻) | 100% | 100% | > Status of coverage: 🟢 - ok, 🟡 - slightly more than threshold, 🔴 - under the threshold

Report generated by 🧪jest coverage report action from 427828cc6adb4f3c276a4dd48957c450044a354b