#165398001 Implement UI feedbacks

[timi-codes]

What does this PR do?

Implement UI feedbacks from Reviewers.

Description of Task to be completed?

1. Refactor javascript files to use const keyword instead of var keyword for variable declarations.
2. Refactor javascript files to use arrow functions instead of named functions.
3. Use icons for delete and view buttons instead of text.
4. Have mobile responsiveness for tables.
5. Add labels to all input text fields.
6. Add hover effects on buttons and links.
7. Position all modals at the center of the page.

How should this be manually tested?

• View GitHub page link here

Any background context you want to provide?

None

What are the relevant pivotal tracker stories?

1. #165380759
2. #165380744
3. #165380705
4. #165334347
5. #165380682
6. #165380662
7. #165380670

Screenshots (if appropriate)

HomePage

Signup Modal

Login Modal

Customer Dashboard

Customer Dashboard(Mobile)

Customer Can Create an Account

Customer Can Create an Account(Mobile)

Cashier Dashboard

Cashier Dashboard (Mobile)

Cashier can view a specific account

Cashier can view a specific account (Mobile)

Cashier can perform a transaction on a customer's account

Cashier can perform a transaction on a customer's account(Mobile)

Admin Dashboard

Admin Dashboard(Mobile)

Admin can create a new staff

Admin can create a new staff (Mobile)

Admin can view a specific account

Admin can view a specific account(Mobile)

Questions:

None