Handle download cancelation from icon properly (fixes #4241)

app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadManager.kt

@@ -212,8 +212,19 @@ class DownloadManager(private val context: Context) {
     fun deleteChapters(chapters: List<Chapter>, manga: Manga, source: Source): List<Chapter> {
         val filteredChapters = getChaptersToDelete(chapters)
 
+        val wasRunning = downloader.isRunning
+        downloader.pause()
+
+        downloader.queue.remove(filteredChapters)
         queue.remove(filteredChapters)
 
+        if (downloader.queue.isEmpty()) {
+            DownloadService.stop(context)
+            downloader.stop()
+        } else if (wasRunning && downloader.queue.isNotEmpty()) {
+            downloader.start()
+        }
+
         val chapterDirs = provider.findChapterDirs(filteredChapters, manga, source)
         chapterDirs.forEach { it.delete() }
         cache.removeChapters(filteredChapters, manga)

app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadNotifier.kt

@@ -165,6 +165,8 @@ internal class DownloadNotifier(private val context: Context) {
      *  This function shows a notification to inform download tasks are done.
      */
     fun onComplete() {
+        dismissProgress()
+
         if (!errorThrown) {
             // Create notification
             with(completeNotificationBuilder) {

app/src/main/java/eu/kanade/tachiyomi/data/download/Downloader.kt

@@ -134,15 +134,16 @@ class Downloader(
 
         if (reason != null) {
             notifier.onWarning(reason)
-        } else {
-            if (notifier.paused) {
-                notifier.paused = false
-                notifier.onPaused()
-            } else {
-                notifier.dismissProgress()
-                notifier.onComplete()
-            }
+            return
         }
+
+        if (notifier.paused && !queue.isEmpty()) {
+            notifier.onPaused()
+        } else {
+            notifier.onComplete()
+        }
+
+        notifier.paused = false
     }
 
     /**