Confirm sidebar deletion popup

Replaced: 
$(this).parents('.smk_sbg_one_sidebar').slideUp('medium', function() { 
								$(this).remove(); 
							});
With:

if(window.confirm(smk_sbg_lang.s_remove)) $(this).parents('.smk_sbg_one_sidebar').slideUp('medium', function() { 
								$(this).remove(); 
							});
Merge pull request #17 from pendira/patch-1

Confirm sidebar deletion popup