Fix issue processwire/processwire-issues#202 where the leave confirm box was appearing when it shouldn't, after saving after a file had been uploaded. Also added drag/drop protection so that if you accidentially drag/drop a file outside of the specified dropzone, it gets ignored, rather than loading the file in the browser.

wire/modules/Inputfield/InputfieldFile/InputfieldFile.js

@@ -405,7 +405,7 @@ $(document).ready(function() {
 			}, false);
 			dropArea.addEventListener("dragenter", function() { 
 				$(this).addClass('ui-state-hover'); 
-				$(this).closest('.Inputfield').addClass('pw-drag-in-file InputfieldStateConfirmLeave');
+				$(this).closest('.Inputfield').addClass('pw-drag-in-file');
 			}, false);
 
 			dropArea.addEventListener("dragover", function (evt) {
@@ -419,7 +419,7 @@ $(document).ready(function() {
 			
 			dropArea.addEventListener("drop", function (evt) {
 				traverseFiles(evt.dataTransfer.files);
-				$(this).removeClass("ui-state-hover").closest('.Inputfield').removeClass('pw-drag-in-file InputfieldStateConfirmLeave');
+				$(this).removeClass("ui-state-hover").closest('.Inputfield').removeClass('pw-drag-in-file');
 				evt.preventDefault();
 				evt.stopPropagation();
 			}, false);		

wire/modules/Inputfield/InputfieldImage/InputfieldImage.js

@@ -1176,7 +1176,7 @@ function InputfieldImage($) {
 				function dragStart() {
 					if($inputfield.hasClass('pw-drag-in-file')) return;
 					$el.addClass('ui-state-hover');
-					$inputfield.addClass('pw-drag-in-file InputfieldStateConfirmLeave');
+					$inputfield.addClass('pw-drag-in-file');
 				}
 				
 				function dragStop() {