Make debug log as big as possible

Tweak style to make the modal reasonably wide/tall, and use flexbox
to automatically expand the textarea.

// FREEBIE

js/views/debug_log_view.js

@@ -13,7 +13,7 @@
             this.$('textarea').val(console.get());
         },
         events: {
-            'submit': 'submit',
+            'click .submit': 'submit',
             'click .close': 'close'
         },
         render_attributes: {