added max of 20 files which can be uploaded at same time to client

services/web/app/views/project/editor/file-tree.jade

@@ -354,6 +354,9 @@ script(type='text/ng-template', id='newFolderModalTemplate')
 script(type="text/ng-template", id="uploadFileModalTemplate")
 	.modal-header
 		h3 #{translate("upload_files")}
+		span  
+		.alert.alert-warning.small(ng-if="tooManyFiles") #{translate("maximum_files_uploaded_together", {max:"{{max_files}}"})}
+
 	.modal-body(
 		fine-upload
 		endpoint="/project/{{ project_id }}/upload"
@@ -365,6 +368,7 @@ script(type="text/ng-template", id="uploadFileModalTemplate")
 		multiple="true"
 		on-complete-callback="onComplete"
 		on-upload-callback="onUpload"
+		on-validate-batch="onValidateBatch"
 		params="{'folder_id': parent_folder_id}"
 	)
 		span #{translate("upload_files")}

services/web/public/coffee/directives/fineUpload.coffee

@@ -14,6 +14,7 @@ define [
 				allowedExtensions: "="
 				onCompleteCallback: "="
 				onUploadCallback: "="
+				onValidateBatch: "="
 				params: "="
 			}
 			link: (scope, element, attrs) ->
@@ -33,10 +34,11 @@ define [
 
 				onComplete = scope.onCompleteCallback or () ->
 				onUpload   = scope.onUploadCallback or () ->
+				onValidateBatch = scope.onValidateBatch or () ->
 				params     = scope.params or {}
 				params._csrf = window.csrfToken
 
-				new qq.FineUploader
+				q = new qq.FineUploader
 					element: element[0]
 					multiple: multiple
 					disabledCancelForFormUploads: true
@@ -49,6 +51,7 @@ define [
 					callbacks:
 						onComplete: onComplete
 						onUpload:   onUpload
+						onValidateBatch: onValidateBatch
 					text: text
 					template: """
 						<div class="qq-uploader">
@@ -63,4 +66,5 @@ define [
 							<ul class="qq-upload-list"></ul>
 						</div>
 					"""
+				return q
 		}

services/web/public/coffee/ide/file-tree/controllers/FileTreeController.coffee

@@ -102,11 +102,12 @@ define [
 		"$scope", "ide", "$modalInstance", "$timeout", "parent_folder",
 		($scope,   ide,   $modalInstance,   $timeout,   parent_folder) ->
 			$scope.parent_folder_id = parent_folder?.id
-
+			$scope.tooManyFiles = false
 			uploadCount = 0
 			$scope.onUpload = () ->
 				uploadCount++
 
+			$scope.max_files = 20
 			$scope.onComplete = (error, name, response) ->
 				$timeout (() ->
 					uploadCount--
@@ -114,6 +115,16 @@ define [
 						$modalInstance.close("done")
 				), 250
 
+			$scope.onValidateBatch = (files)->
+				if files.length > $scope.max_files
+					$timeout (() ->
+						$scope.tooManyFiles = true
+					), 1
+					return false
+				else
+					return true
+
+
 			$scope.cancel = () ->
 				$modalInstance.dismiss('cancel')
 	]