VE-1478: Set width, height and position template dialog in the correct p...

...lace

Moved and renamed method ve.ui.Dialog.prototype.alignToSurface to ve.ui.WikiaTransclusionDialog.prototype.position because it is not a generic dialog method. For instance, to work properly, it depends on dialog being opened for a focusable node. Also, what it does, it's pretty specific (at least at this moment) to this particlar dialog.

Minor fix to accessing template name for displaying purpose - use actually template spec instead of private variables.

Removed the default height for draggable dialog.

https://wikia-inc.atlassian.net/browse/VE-1478
I would set width and max-height in the WikiaTransclusionDialog.scss file since they won't change.