rmdp-container Class Doesn't Automatically Use Full Width in Input Mode

[fariidlotfi]

When using react-multi-date-picker, the rmdp-container class applied to the date picker component does not automatically set its width to 100%. This causes the date picker to appear misaligned or not fully utilize the available space, especially when integrated with other UI components.

I had to manually override the CSS with width: 100% to ensure the input field spans the full width of its container. It would be great if the default behavior of the rmdp-container class could be adjusted to use width: 100% by default, particularly in scenarios where the picker is rendered as an inline input.

Thank you for your efforts on this great package!