[LazyListView]: fixed backgroundReload functionality.

[Kuznietsov]

Summary

Fixed showing blocker when filter/sorting changed.
Fixed showing placeholders while backgroundReload=true and placeholders should not appear.

[github-actions]

Bundle size diff (in kBytes). Not gzipped. Both CSS & JS included.
Baseline: v5.4.1 (2023-12-06)
Generated by: track-bundle-size. Exceeds Limits: no
Generated at: Thu, 07 Dec 2023 11:09:04 GMT

Module	Baseline Size (v5.4.1)	Size	Diff	Within Threshold	Threshold (min - max)
templateApp	1043.31	1043.31	0	🆗	938.98 - 1147.64
@epam/app	8426.98	8426.98	+0	🆗	7584.28 - 9269.68
@epam/draft-rte	56.73	56.73	0	🆗	51.06 - 62.41
@epam/electric	25.74	25.74	0	🆗	23.16 - 28.31
@epam/promo	79.3	79.3	0	🆗	71.37 - 87.23
@epam/uui-extra	0.21	0.21	0	🆗	0.19 - 0.24
@epam/loveship	152.67	152.67	0	🆗	137.4 - 167.94
@epam/uui-components	278.43	278.43	0	🆗	250.58 - 306.27
@epam/uui-core	275.67	275.66	-0.01	🆗	248.1 - 303.24
@epam/uui-db	44.47	44.47	0	🆗	40.02 - 48.92
@epam/uui-docs	176.44	176.44	0	🆗	158.79 - 194.08
@epam/uui-editor	175.51	175.51	0	🆗	157.96 - 193.06
@epam/uui-timeline	49.12	49.12	0	🆗	44.21 - 54.03
@epam/uui	557.19	557.19	0	🆗	501.47 - 612.91

new sizes (raw)

To set the sizes as a new baseline, you can copy/paste next content to the uui-build/config/bundleSizeBaseLine.json and commit the file.

{
  "version": "5.4.1",
  "timestamp": "2023-12-07",
  "sizes": {
    "templateApp": 1068346,
    "@epam/app": 8629232,
    "@epam/draft-rte": 58093,
    "@epam/electric": 26356,
    "@epam/promo": 81205,
    "@epam/uui-extra": 219,
    "@epam/loveship": 156332,
    "@epam/uui-components": 285108,
    "@epam/uui-core": 282280,
    "@epam/uui-db": 45539,
    "@epam/uui-docs": 180673,
    "@epam/uui-editor": 179721,
    "@epam/uui-timeline": 50296,
    "@epam/uui": 570562
  }
}