[WIP] New Authentication layout (#536)

android/app/src/main/res/drawable-hdpi/eye.png

android/app/src/main/res/drawable-hdpi/eye_slash.png

android/app/src/main/res/drawable-hdpi/hashtag.png

android/app/src/main/res/drawable-hdpi/icon_facebook.png

android/app/src/main/res/drawable-hdpi/icon_github.png

android/app/src/main/res/drawable-hdpi/icon_gitlab.png

android/app/src/main/res/drawable-hdpi/icon_google.png

android/app/src/main/res/drawable-hdpi/icon_linkedin.png

android/app/src/main/res/drawable-hdpi/icon_meteor.png

android/app/src/main/res/drawable-hdpi/icon_twitter.png

android/app/src/main/res/drawable-hdpi/key.png

android/app/src/main/res/drawable-hdpi/lock.png

android/app/src/main/res/drawable-hdpi/mail.png

android/app/src/main/res/drawable-hdpi/mention.png

android/app/src/main/res/drawable-hdpi/more.png

android/app/src/main/res/drawable-hdpi/options.png

...d/app/src/main/res/drawable-hdpi/subscription_hashtag.png

android/app/src/main/res/drawable-hdpi/subscription_lock.png

android/app/src/main/res/drawable-hdpi/user.png

android/app/src/main/res/drawable-mdpi/eye.png