res/installer:update mgsid and ui for installation failed page.

tower:https://tower.im/projects/8f19f0bf0e754f0b82ef2c24bc230973/todos/153fc444db0f4886949bb0586044eac2/

Change-Id: I37ffb29834943f4945e8d22fe21d880038dd596c
res/installer:the username value must convert to lowercase

tower:https://tower.im/projects/8f19f0bf0e754f0b82ef2c24bc230973/todos/800b5ae5eefe4dc8b1938792cba5ac7c/#94e197811bfb44a99b0753762d209093

Change-Id: I9c5f086cfa55f4cb4e219059d0102803fa0e2719