Fix #230: More correct initial preview delete reset

CHANGE.md

@@ -56,6 +56,7 @@ version 4.1.8
 33. (enh #227): Created Ukranian translations and updated Russian translations.
 34. (enh #228): Created Thai translations.
 35. (enh #229): Created French translations.
+36. (enh #230): More correct initial preview delete reset.
 
 version 4.1.7
 =============

js/fileinput.js

@@ -949,7 +949,7 @@
                             self.clearObjects($frame);
                             $frame.remove();
                             resetProgress();
-                            if (!previewCache.count(self.id)) {
+                            if (!previewCache.count(self.id) && self.getFileStack().length === 0) {
                                 self.reset();
                             }
                         });