Stpriyasharma

# Brief Title Adding responsiveness to mobile devices for modals Fixes #942 ## Video/Screenshots https://github.com/user-attachments/assets/acaced68-cf06-4a43-81ea-39f09ec0f8ec ## PR Test Details **Note**: The PR will be ready for live testing at https://rocketchat.github.io/EmbeddedChat/pulls/pr-943...