Fixes a few bugs (#535)

## Description

A few minor bug fixes across the app

- Fix the language not showing after search on the subtitle search &
download dialog
- Clear the backdrop whenever the home page is reloading from scratch
- Enable pressing a remote's play (or play/pause) button on the series
page to play the focused episode

### Related issues
Play button follow up from #424

app/src/main/java/com/github/damontecres/wholphin/ui/detail/series/SeriesOverviewContent.kt

@@ -40,6 +40,7 @@ import androidx.compose.ui.focus.focusRequester
 import androidx.compose.ui.focus.focusRestorer
 import androidx.compose.ui.focus.onFocusChanged
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.input.key.onKeyEvent
 import androidx.compose.ui.input.nestedscroll.nestedScroll
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
@@ -59,6 +60,7 @@ import com.github.damontecres.wholphin.ui.components.TabRow
 import com.github.damontecres.wholphin.ui.formatDateTime
 import com.github.damontecres.wholphin.ui.ifElse
 import com.github.damontecres.wholphin.ui.logTab
+import com.github.damontecres.wholphin.ui.playback.isPlayKeyUp
 import com.github.damontecres.wholphin.ui.tryRequestFocus
 import com.github.damontecres.wholphin.ui.util.rememberDelayedNestedScroll
 import kotlinx.coroutines.launch
@@ -249,6 +251,12 @@ fun SeriesOverviewContent(
                                                             bringIntoViewRequester.bringIntoView()
                                                         }
                                                     }
+                                                }.onKeyEvent {
+                                                    if (episode != null && isPlayKeyUp(it)) {
+                                                        onClick.invoke(episode)
+                                                        return@onKeyEvent true
+                                                    }
+                                                    return@onKeyEvent false
                                                 },
                                         interactionSource = interactionSource,
                                         cardHeight = 120.dp,

app/src/main/java/com/github/damontecres/wholphin/ui/main/HomeViewModel.kt

@@ -91,6 +91,7 @@ class HomeViewModel
                     ),
             ) {
                 Timber.d("init HomeViewModel")
+                backdropService.clearBackdrop()
 
                 serverRepository.currentUserDto.value?.let { userDto ->
                     val includedIds =

app/src/main/java/com/github/damontecres/wholphin/ui/playback/DownloadSubtitlesDialog.kt

@@ -107,7 +107,7 @@ fun DownloadSubtitlesContent(
                     color = MaterialTheme.colorScheme.onSurface,
                 )
 //                val lang = rememberTextFieldState(language)
-                var lang by rememberSaveable { mutableStateOf("") }
+                var lang by rememberSaveable { mutableStateOf(language) }
                 Row(
                     horizontalArrangement = Arrangement.spacedBy(8.dp),
                     verticalAlignment = Alignment.CenterVertically,