Move styling of labels to dialog.css

[Alfonso Martínez de Lizarrondo]

The sample.css includes a rule to style labels in dialogs:

.cke_dialog label
{
	display: inline;
	margin-bottom: auto;
}

That's added to override the default styling for labels in the previous lines.

Other pages can use similar styling and people sometimes post screenshots of broken dialogs, and putting this in the default dialog.css can help a little.

And at the same time we can change the cursor so it's an arrow instead of a text caret.

[Alfonso Martínez de Lizarrondo]

Proposed patch

[Garry Yao]

Fixed with [7541].