Added eye

[samagragupta]

Fixes #457

Checklist

• I have read the Contribution & Best practices Guide and my PR follows them.
• My branch is up-to-date with the Upstream master branch.
• The unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

• All the functions created/modified in this PR contain relevant docstrings.

Short description of what this resolves:

Changes proposed in this pull request:

Added eye feature to show password.

[rajvaibhavdubey]

@samagragupta I already did that in #447