The dialog for the Description field is too small

[asoltesz]

By default, the editing dialog is very small for the Description dialog.

I usually have fairly long task descriptions (and I think many others as well).

Resizing is not really possible due to the weird way it behaves (header moves out of the screen when the Textarea is resized).

Potential solutions:

1. Allow a proper dialog resize and remember it (place dialog settings (position, size) in the local storage of the browser)

2. A better sizing method
   Maybe the whole yellow area could be covered with the dialog starting from below the title of the issue.
   That would be comfortable most of the time