Fixed select2 “x” color on multi-select and border color

[snipe]

This fixes a small UI quirk that made the color of the "x" in a multi-select box look weird, and the outline of the box was also a slightly different color.

Before

After

[what-the-diff]

PR Summary

• CSS Style Adjustments

  Enhanced user interface with several style additions to the application. Key elements like selection choices, multiple selections display, and the branding images now have new styles which contribute to an improved look and feel of the application.

• CSS Files Version Update

  The version identifiers for the CSS files in our project have been updated. This change helps ensure all users receive the latest design updates when they visit the website.

• CSS Overriding Adjustments

  Implemented specific style adjustments to existing website elements through our override stylesheets. This method allows us to modify the look of certain elements without affecting the overall style structure.

This PR focuses on enhancing user experience via stylish interface adjustments and ensuring that the latest changes are effectively reflected to the users.