Improve calendar full-screen view on large monitors

Current behavior:

• In half-screen view, the iGMS calendar shows a horizontal scrollbar, allowing navigation across multiple months.

• In full-screen view, the horizontal scrollbar disappears and the calendar is limited to showing only one month at a time, despite the available screen space.

Expected behaviour / request:

• In full-screen mode, the calendar should expand to utilize the full screen width and display multiple months side by side (similar to Airbnb’s calendar behavior).