Refactor widgets

- Move widget templates to subfolder
- Add new generic filter widget templates to replace category, network and filer filters
- Update styles

view/theme/quattro/templates/widget/filter.tpl

@@ -0,0 +1,14 @@
+<div id="{{$type}}-sidebar" class="widget">
+	<h3>{{$title}}</h3>
+{{if $desc}}
+	<div id="{{$type}}-desc">{{$desc nofilter}}</div>
+{{/if}}
+	
+	<ul class="{{$type}}-ul">
+		<li class="tool {{if !$selected}}selected{{/if}}"><a href="{{$base}}" class="{{$type}}-link {{$type}}-all">{{$all_label}}</a>
+{{foreach $options as $option}}
+		<li class="tool {{if $selected == $option.ref}}selected{{/if}}"><a href="{{$base}}{{$type}}={{$option.ref}}" class="{{$type}}-link">{{$option.name}}</a></li>
+{{/foreach}}
+	</ul>
+	
+</div>