Persist blob editor's value on submit, not on click

Prior, the value of the Ace editor was only being persisted if the user
physically clicked the submit button, which the "quick submit" behavior
doesn't do.

Now the value will be properly transferred before any form is submitted.

app/assets/javascripts/blob/edit_blob.js.coffee

@@ -11,10 +11,10 @@ class @EditBlob
     if ace_mode
       editor.getSession().setMode "ace/mode/" + ace_mode
 
-    $(".js-commit-button").click ->
-      $("#file-content").val editor.getValue()
-      $(".file-editor form").submit()
-      return false
+    # Before a form submission, move the content from the Ace editor into the
+    # submitted textarea
+    $('form').submit ->
+      $("#file-content").val(editor.getValue())
 
     editModePanes = $(".js-edit-mode-pane")
     editModeLinks = $(".js-edit-mode a")

app/assets/javascripts/blob/new_blob.js.coffee

@@ -11,10 +11,10 @@ class @NewBlob
     if ace_mode
       editor.getSession().setMode "ace/mode/" + ace_mode
 
-    $(".js-commit-button").click ->
-      $("#file-content").val editor.getValue()
-      $(".file-editor form").submit()
-      return false
+    # Before a form submission, move the content from the Ace editor into the
+    # submitted textarea
+    $('form').submit ->
+      $("#file-content").val(editor.getValue())
 
   editor: ->
     return @editor