Do not bother recovering useless replays (fixes #444)

Useless replays being those for which auto-recording was disabled and Start
never pressed.

src/main/java/com/replaymod/core/ReplayMod.java

@@ -476,6 +476,14 @@ public class ReplayMod implements
                     String name = path.getFileName().toString();
                     if (name.endsWith(".mcpr.tmp") && Files.isDirectory(path)) {
                         Path original = path.resolveSibling(FilenameUtils.getBaseName(name));
+                        Path noRecoverMarker = original.resolveSibling(original.getFileName() + ".no_recover");
+                        if (Files.exists(noRecoverMarker)) {
+                            // This file, when its markers are processed, doesn't actually result in any replays.
+                            // So we don't really need to recover it either, let's just get rid of it.
+                            FileUtils.deleteDirectory(path.toFile());
+                            Files.delete(noRecoverMarker);
+                            continue;
+                        }
                         new RestoreReplayGui(this, GuiScreen.wrap(mc.currentScreen), original.toFile()).display();
                     }
                 }

src/main/java/com/replaymod/recording/packet/PacketListener.java

@@ -272,6 +272,10 @@ public class PacketListener extends ChannelInboundHandlerAdapter {
                         // Immediately close the saving popup, the user doesn't care about it
                         core.runLater(guiSavingReplay::close);
 
+                        // If we crash right here, on the next start we'll prompt the user for recovery
+                        // but we don't really want that, so drop a marker file to skip recovery for this replay.
+                        Files.createFile(outputPath.resolveSibling(outputPath.getFileName() + ".no_recover"));
+
                         // We still have the replay, so we just save it (at least for a few weeks) in case they change their mind
                         String replayName = FilenameUtils.getBaseName(outputPath.getFileName().toString());
                         Path rawFolder = ReplayMod.instance.getRawReplayFolder();