[@mantine/core] Modal: Fix content shifting in full screen modal (#2348)

* [@mantine/core] Select: only use open/close callback when value changes

* [@mantine/core] Select: do not use early return

* [@mantine/core] Modal: full screen width to 100vw

src/mantine-core/src/Modal/Modal.styles.ts

@@ -71,7 +71,7 @@ export default createStyles(
 
     modal: {
       position: 'relative',
-      width: fullScreen ? undefined : theme.fn.size({ sizes, size }),
+      width: fullScreen ? '100vw' : theme.fn.size({ sizes, size }),
       borderRadius: fullScreen ? 0 : undefined,
       outline: 0,
       backgroundColor: theme.colorScheme === 'dark' ? theme.colors.dark[7] : theme.white,