Autofocus 'Start' button on welcome page
Autofocus 'Start' button on welcome page

Allows to get to Fuel main UI by pressing Enter 2 times
from login page

Change-Id: I0984943c9c8608c8cdc9077dd295d4f73a4e0c8a

zhaochao/fuel-web,eayunstack/fuel-web,zhaochao/fuel-web,huntxu/fuel-web,prmtl/fuel-web,eayunstack/fuel-web,stackforge/fuel-web,SmartInfrastructures/fuel-web-dev,eayunstack/fuel-web,huntxu/fuel-web,SmartInfrastructures/fuel-web-dev,prmtl/fuel-web,nebril/fuel-web,nebril/fuel-web,SmartInfrastructures/fuel-web-dev,stackforge/fuel-web,nebril/fuel-web,zhaochao/fuel-web,eayunstack/fuel-web,huntxu/fuel-web,prmtl/fuel-web,stackforge/fuel-web,SmartInfrastructures/fuel-web-dev,nebril/fuel-web,prmtl/fuel-web,SmartInfrastructures/fuel-web-dev,zhaochao/fuel-web,nebril/fuel-web,huntxu/fuel-web,zhaochao/fuel-web,prmtl/fuel-web,huntxu/fuel-web,eayunstack/fuel-web