Fixes homepage preference for new tab when it's opened with a keyboard
Fixes homepage preference for new tab when it's opened with a keyboard

Resolves #8278

Auditors: @bsclifton

Test Plan:
- Open preferences, set homepage value
- Set new tab to open homepage
- Open a new tab with a keyboard (cmd+t)

timborden/browser-laptop,luixxiul/browser-laptop,timborden/browser-laptop,timborden/browser-laptop,diasdavid/browser-laptop,diasdavid/browser-laptop,diasdavid/browser-laptop,luixxiul/browser-laptop,timborden/browser-laptop,luixxiul/browser-laptop,luixxiul/browser-laptop,diasdavid/browser-laptop