Style tweak for plugins delete confirmation page

[Simek]

Style tweak for plugins delete confirmation page. Plugins list and file list stylized.

Todo: Write a function which count plugins or check if plugin number is different than "1" and show proper page title.

[ryan]

URLs used in a redirect don't need the &amp treatment, do they?

[Simek]

Replying to ryan:

URLs used in a redirect don't need the &amp treatment, do they?

You have right Ryan, corrected patch attached with same name.

[Simek]

Here you find a preview of changes: ​http://i40.tinypic.com/3478fuw.png

[azaozz]

(In [11361]) Style tweaks for plugins delete confirmation page, props Simek, fixes #9799