Redesign of Login/Sign up process

[mrjavanmardi]

As we see, there are a lot of errors in UserExperience, functionalities, design, etc.
So the app requires a complete redesigning process to create a better experience for users.
In this PullRequest we don't have any important change in functionalities,but we tried to use a standard design,standard texts,standard icons, etc.
One of the biggest problems of the app is that we see some tabs and features which seem that they don't have professional designers and probably designed basically by the developer(like pop ups)
Also we have some useless tabs which should merged to each other.
In this PR we redesigned all those forgotten tabs and optimized the process of login, sign up and account recovery.

#1193