[HC] Missing hover/focus style on UI

[Garry Yao]

The following UI items are missing in the default skin, for proper styling when hovered/focused

1. All toolbar items;
2. Elements path bar items;
3. Dialog fields;

[Garry Yao]

Besides of the ticket tc, there're other minor issues found needed to be fixed in this ticket:

• Resizer is not properly displayed as triangle;
• [Firefox] Dialog select field is missing border;
• [IE7] Dialog text field border get doubled;
• Hover menu items enlarges the element size;
• No hover/focus style for listbox item;

[Garry Yao]

Opened t/9540 for review.

[Piotrek Koszuliński]

All issues are fixed, but I think that something's wrong with inputs. See that inputs don't fill entire outer container.

Master:

IE9@t/9540:

FF@t/9540:

[Garry Yao]

Fixed the border enlarged issue, a small addition is necessary on dialogui plugin, to give selection field a container element.

[Garry Yao]

Fixed on master with:

​https://github.com/ckeditor/ckeditor-dev/commit/ec1fb4ee541e57703a6092d8e556793925cfb3a0