menus: scroll the context sheet when it outgrows the screen

A multi-artist album or song now adds one row per artist, so the sheet can
exceed the screen and clip the remaining actions. Cap it at 560dp and scroll
the content inside.

app/src/test/kotlin/com/subtracks/ui/components/ItemContextMenuArtistTest.kt

@@ -9,6 +9,7 @@ import androidx.compose.ui.test.assertIsDisplayed
 import androidx.compose.ui.test.junit4.v2.createAndroidComposeRule
 import androidx.compose.ui.test.onNodeWithText
 import androidx.compose.ui.test.performClick
+import androidx.compose.ui.test.performScrollTo
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import com.subtracks.data.model.ArtistRef
 import com.subtracks.data.model.Song
@@ -67,4 +68,29 @@ class ItemContextMenuArtistTest {
 
         assertEquals("ar2", opened)
     }
+
+    @Test
+    fun longMenusScrollToTheLastArtist() {
+        var opened: String? = null
+        composeRule.setContent {
+            SubtracksTheme {
+                ItemContextMenu(
+                    target =
+                        MenuTarget.Song(
+                            song.copy(artists = (1..20).map { ArtistRef("ar$it", "Artist $it") }),
+                        ),
+                    actions = ItemActions(viewArtist = { opened = it }),
+                    onDismiss = {},
+                )
+            }
+        }
+
+        composeRule.onNodeWithText("Artist 20").performScrollTo().assertIsDisplayed()
+
+        composeRule.mainClock.autoAdvance = false
+        composeRule.onNodeWithText("Artist 20").performClick()
+        composeRule.mainClock.advanceTimeBy(1_000)
+
+        assertEquals("ar20", opened)
+    }
 }