Fix disappearance items when fast scrolling (#1035)

* Don't use animateItem's fade-in/fade-out in FastScrollLazyColumn

* Move to extension function

Avoid using animateItemPlacement name since it's shadowed by compose-bom's deprecated one

app/src/main/java/eu/kanade/presentation/browse/ExtensionsScreen.kt

@@ -48,6 +48,7 @@ import eu.kanade.presentation.browse.components.ExtensionIcon
 import eu.kanade.presentation.components.WarningBanner
 import eu.kanade.presentation.manga.components.DotSeparatorNoSpaceText
 import eu.kanade.presentation.more.settings.screen.browse.ExtensionReposScreen
+import eu.kanade.presentation.util.animateItemFastScroll
 import eu.kanade.presentation.util.rememberRequestPackageInstallsPermissionState
 import eu.kanade.tachiyomi.extension.model.Extension
 import eu.kanade.tachiyomi.extension.model.InstallStep
@@ -187,14 +188,14 @@ private fun ExtensionContent(
                             }
                         ExtensionHeader(
                             textRes = header.textRes,
-                            modifier = Modifier.animateItem(),
+                            modifier = Modifier.animateItemFastScroll(),
                             action = action,
                         )
                     }
                     is ExtensionUiModel.Header.Text -> {
                         ExtensionHeader(
                             text = header.text,
-                            modifier = Modifier.animateItem(),
+                            modifier = Modifier.animateItemFastScroll(),
                         )
                     }
                 }
@@ -212,7 +213,7 @@ private fun ExtensionContent(
                 },
             ) { item ->
                 ExtensionItem(
-                    modifier = Modifier.animateItem(),
+                    modifier = Modifier.animateItemFastScroll(),
                     item = item,
                     onClickItem = {
                         when (it) {