Added Edit Dialog And Timetable

[Artistic18]

Description:

1. Added Timetable Page.
2. Added Edit Dialog Functionality.
3. Made necessary UI changes to support the new additions.

Fixes #97 :

Have you read the Contributing Guidelines on Pull Requests?

• Yes
• No

Type of change:

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the style guidelines(Clean Code) of this project
• I have performed a self-review of my own code
• My changes generate no new warnings
• I have added tests/screenshots(if any) that prove my fix is effective or that my feature works.

Screenshots:

Edit Dialog Mobile View.