Bump accessibility

Fixes

Partially addresses #320 (closed) by @RoLoDeXx

Description

Type of PR This PR is a [improvement].

Technicalities

Certain templates lacked header elements. These have been added so there might be minor font-size changes in them. Screenshots below. The select dropdown on /home has been replaced with in built $this->Form.

Tests

Install WAVE accessibility checker or similar(Any reputed checker that follows WCAG standards)

Screenshots

Checklist:

• My pull request has a descriptive title (not a vague title like "Update index.md").
• My pull request targets the phoenix/develop branch of the repository.
• My commit messages follow best practices.
• My code follows the established code style of the repository.
• I tried running the project locally and verified that there are no visible errors.