Added probing for modal dialog to prevent conflicts of more modal dialogs at same time.

app/assets/javascripts/app/controllers/_application_controller.coffee

@@ -676,6 +676,8 @@ class App.ControllerModal extends App.Controller
   closeOnAnyClick: false
   initalFormParams: {}
   initalFormParamsIgnore: false
+  showTryMax: 10
+  showTrydelay: 1000
 
   events:
     'submit form':                        'submit'
@@ -687,6 +689,7 @@ class App.ControllerModal extends App.Controller
 
   constructor: ->
     super
+    @showTryCount = 0
 
     if @authenticateRequired
       return if !@authenticateCheckRedirect()
@@ -699,6 +702,16 @@ class App.ControllerModal extends App.Controller
     if @shown
       @render()
 
+  showDelayed: =>
+    delay = =>
+      @showTryCount += 1
+      @render()
+    @delay(delay, @showTrydelay)
+
+  modalAlreadyExists: ->
+    return true if $('.modal').length > 0
+    false
+
   content: ->
     'You need to implement a one @content()!'
 
@@ -737,6 +750,10 @@ class App.ControllerModal extends App.Controller
     @el
 
   render: =>
+    if @modalAlreadyExists() && @showTryCount <= @showTryMax
+      @showDelayed()
+      return
+
     @initalFormParamsIgnore = false
 
     if @buttonSubmit is true