* fix:
* added css variables for primary color
* added styles for dropHint custom icon
* feat:
* styled the remove uploaded file icon to match re-skinning
* added theme font-family to the contents inside the upload modal
* styled upload button to match re-skinning
* feat:
* set cancel button color to theme's primary color
* set the close button style according to theme
* set the border radius of the upload modal
* set the error message styles in accordance with re-skinning
* fix: cross mark position on the top right corner of upload modal
* fix: added hover background color on modal back and add more files button
* fix: added border radius fix for file remove button
* fix: modal close icon
* fix: addressed feedback from dilip
* fix: font-family issue inside the modal
* test: added cypress test to test styling logic
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