fix(settings): keep the update badge after a failed download

Errors of downloads this screen did not start no longer touch the
status; when the prior status is unknown or still unresolved, today's
persisted status is restored or a fresh evaluation runs instead of
fabricating UpToDate.

app/src/main/java/com/example/research/core/util/NaturalSort.kt

@@ -118,12 +118,7 @@ private fun compareNatural(a: String, b: String): Int {
                 j = endB
             }
             else -> {
-                if (ca != cb) {
-                    val numeralA = !asciiA && isNumeralChar(ca)
-                    val numeralB = !asciiB && isNumeralChar(cb)
-                    if (numeralA != numeralB) return if (numeralA) -1 else 1
-                    return ca.compareTo(cb)
-                }
+                if (ca != cb) return ca.compareTo(cb)
                 i++
                 j++
             }

app/src/main/java/com/example/research/ui/settings/SettingsViewModel.kt

@@ -216,14 +216,21 @@ class SettingsViewModel(
                         }
                     }
                     is DownloadState.Error -> {
+                        val startedHere = statusBeforeDownload != DictionaryStatus.Unknown ||
+                            isDownloadInProgress
                         isDownloadInProgress = false
                         if (!errorStateHandled) {
                             errorStateHandled = true
-                            dictionaryStatus.value = if (dictionaryState.dictionaries.isEmpty()) {
-                                DictionaryStatus.Empty
-                            } else when (statusBeforeDownload) {
-                                DictionaryStatus.Unknown, DictionaryStatus.Checking -> DictionaryStatus.UpToDate
-                                else -> statusBeforeDownload
+                            if (dictionaryState.dictionaries.isEmpty()) {
+                                dictionaryStatus.value = DictionaryStatus.Empty
+                            } else if (startedHere) {
+                                when (statusBeforeDownload) {
+                                    DictionaryStatus.Unknown, DictionaryStatus.Checking ->
+                                        viewModelScope.launch {
+                                            restoreOrEvaluateDictionaryStatus()
+                                        }
+                                    else -> dictionaryStatus.value = statusBeforeDownload
+                                }
                             }
                             if (pendingSourceUrls.isNotEmpty()) {
                                 pendingSourceUrls.forEach { urlTemplate ->