remember list in ThreadItemView preview

briar-desktop/src/main/kotlin/org/briarproject/briar/desktop/forums/ThreadItemView.kt

@@ -34,11 +34,13 @@ import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.selection.selectable
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.material.MaterialTheme
 import androidx.compose.material.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment.Companion.Center
 import androidx.compose.ui.Alignment.Companion.CenterVertically
 import androidx.compose.ui.Modifier
@@ -67,14 +69,19 @@ import kotlin.random.Random
 
 @Suppress("HardCodedStringLiteral")
 fun main() = preview {
-    LazyColumn {
-        for (i in 1..5) {
-            item {
-                ThreadItemView(
-                    item = ForumPostItem(
+    val list = remember {
+        (0..8).map { i ->
+            ForumPostItem(
                 h = getRandomForumPostHeader(),
                 text = getRandomString(Random.nextInt(1, 1337)),
-                    ).apply { setLevel(Random.nextInt(0, 6)) },
+            ).apply { setLevel(i % 7) }
+        }
+    }
+
+    LazyColumn {
+        items(list) { item ->
+            ThreadItemView(
+                item = item,
                 maxNestingLevel = 3,
                 selectedPost = null,
                 onPostSelected = {},
@@ -82,7 +89,6 @@ fun main() = preview {
         }
     }
 }
-}
 
 @Composable
 fun ThreadItemView(