[css-forms] Add notes on datalist/select styling.

Author: tabatkins

css-forms/Overview.bs

@@ -133,6 +133,27 @@ Issue: <a href="http://blog.teamtreehouse.com/use-meter-progress-elements">&lt;p
 
 Issue: Insert &lt;select> and &lt;datalist> styling proposal and/or whiteboard photo.
 
+Select/Datalist Dropdown {#select-dropdown}
+----------------------------------
+
+1. Only allow styling if both 'color!!property' and 'background' are set.
+2. Option container:
+	* backgrounds
+	* borders
+	* padding
+3. <{option}>
+	* padding
+	* borders
+	* border-collapse?
+	* backgrounds
+	* display-inside is allowed, automatically blockified
+	* not margins, position, float, width, height
+
+	All options are contain:paint and BFCs.
+
+
+
+
 Input UI Examples {#examples}
 =============================