Removed text-center, adding left/right padding to button text (auth0#1808)

Author: Steve Hobbs

css/index.styl

@@ -596,6 +596,8 @@ loadingSize = 30px
         display block
         overflow hidden
         width 100%
+        padding-left 50px
+        padding-right 15px
         line-height 40px
         text-align left
         text-overflow ellipsis
@@ -605,8 +607,6 @@ loadingSize = 30px
         white-space nowrap
         transition background 0.3s
         -webkit-transition background 0.3s
-        text-align center
-        padding-right 20px    // just enough to balance out the social button (width: 40px)
 
         // Thicken up the font on HDPI devices
         @media (-webkit-min-device-pixel-ratio: 2),