Should always show devtools instead of toggling when getting error.

src/app/atom.coffee

@@ -207,6 +207,10 @@ window.atom =
     else
       @pendingModals[stackSize - 1].shift()
 
+  openDevTools: ->
+    currentWindow = require('remote').getCurrentWindow()
+    currentWindow.openDevTools()
+
   toggleDevTools: ->
     currentWindow = require('remote').getCurrentWindow()
     currentWindow.toggleDevTools()

src/app/window.coffee

@@ -235,7 +235,7 @@ window.reload = ->
     $native.reload()
 
 window.onerror = ->
-  atom.toggleDevTools()
+  atom.openDevTools()
 
 window.registerDeserializers = (args...) ->
   registerDeserializer(arg) for arg in args