Add 1.4.0 to changelog

[MatkovIvan]

No description provided.

[m-sasha]

All the scrollbar fixes are missing:

• Fix shaky scrolling of LazyColumn when the items are of varying size compose-multiplatform-core#362
• Make ScrollbarAdapter for LazyList take contentPadding into account. compose-multiplatform-core#365
• Distinguish between scrollbar (track) size and scrollable viewport size. compose-multiplatform-core#366
• Compute LazyScrollbarAdapter.scrollOffset via layoutInfo.visibleItemsInfo instead of firstVisibleItemIndex compose-multiplatform-core#372
• Implement TextFieldScrollState and TextFieldScrollbarAdapter compose-multiplatform-core#384
• Fix the scrollbar not reaching its start/end during a drag. compose-multiplatform-core#387
• Fix scrollbar track-press scroll compose-multiplatform-core#409

These can be summarized as

Major scrollbar overhaul

• Scrollbar now works correctly in lazy lists when items vary in size.
• Scrollbar now works correctly with lazy list contentPadding.
• Scrollbar now works correctly in lazy list with spacing between items.
• Scrollbar now works correctly if the size of the scrollbar doesn't match the size of the widget it scrolls.
• Pressing the scrollbar track now works correctly.
• Added scrollbar support for lazy grids and text fields.

[m-sasha]

Fix window-sizing with WindowState(size=Dp.Unspecified, undecorated=true, resizable=true) is missing too.