Keep search bar state across configuration changes

app/src/main/kotlin/com/hippo/ehviewer/ui/screen/SearchBarScreen.kt

@@ -48,6 +48,7 @@ import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
@@ -114,7 +115,7 @@ fun SearchBarScreen(
 ) {
     var mSuggestionList by remember { mutableStateOf(emptyList<Suggestion>()) }
     val mSearchDatabase = searchDatabase.searchDao()
-    var active by remember { mutableStateOf(false) }
+    var active by rememberSaveable { mutableStateOf(false) }
     val scope = rememberCoroutineScope { Dispatchers.IO }
     val context = LocalContext.current
     val dialogState = LocalDialogState.current