+ Updated $can_filter to include Firefox 35+ and Android KitKat brows…

…er, and $can_sticky to include Chrome 56+ (AT LAST!) and remove the small hack in my 'follow me' implementation. (common.css, sections.css)

@ I'm also considering removing the entire follow_me function from topic.js... Its main problem is that it makes it hard (if not impossible?) to change the layout of avatar boxes. The only browser that need it now are IE 8 and above. I wanna say I don't care about them... I don't know.

core/skins/common.css

@@ -187,8 +187,8 @@ $can_flex		= @is ("firefox[22-], opera[12.1-], chrome[27-], ie[10-], safari[7-]"
 /* List browsers that support CSS3 animations (Wedge adds prefixes automatically.) */
 $can_animate	= @is ("chrome, firefox[5-], opera[12-], ie[10-], safari[4-], ios[3.2-], android[2.1-]")
 
-/* List browsers that support CSS filters (not the old IE ones!). Note that Firefox[3.5-] supports filter: url() with SVG filters. */
-$can_filter		= @is ("chrome[18-], safari[6-]")
+/* List browsers that support CSS filters (not the old IE ones!). */
+$can_filter		= @is ("chrome[18-], firefox[35-], safari[6-], android[4.4-]")
 
-/* List browsers that support position: sticky. iOS needs a prefix, others do not. Support data is as of September 2014. */
-$can_sticky		= @is ("ios[6.1-] || (firefox[32-] && !mobile)")
+/* List browsers that support position: sticky. iOS needs a prefix, others do not. Support data is as of March 2017. */
+$can_sticky		= @is ("ios[6.1-] || chrome[56-] || (firefox[32-] && !mobile)")

core/skins/sections.css

@@ -361,7 +361,7 @@ hr.sep
 	> div
 		width: 100%
 		top: 6px
-		@if $can_sticky || chrome
+		@if $can_sticky
 			position: @is (ios, -prefix-sticky, sticky)
 		@endif