[Feat] Reset password to null

[BLasan]

Description After an unsuccessful login password have to be reset to null with highlighting the password container. Form validations are added and the login button will enable only if both user name and password are provided.

Related Issue

906

Motivation and Context Password will be reset to null after an invalid login.

How Has This Been Tested? Manually tested by inputting wrong credentials.

Screenshots (In case of UI changes):

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have added tests to cover my changes.
• [x] All new and existing tests passed.

[BLasan]

@kmehant Please review the PR

[BLasan]

@kmehant Please review

[grwt]

why it isn't merged yet? is this still open...????