Add feature state templates (#3680)

* Add feature state template

* tweak css

* change wording

* apply wording changes to alpha and beta

* tweak dialog css

* tweak code highlighting

* tweak dialog style

* set for_k8s_version default

* tweak dialog ul

* make init containers 1.5 beta for now

* set default dialog width

* revert a:visited color

* force code style

* simplify copy for alpha, beta, stable

* tweak code style

* fix beta dialog title

* fix dialog link a code

* remaining tweaks

* set a:visited color

* Address Steve's feedback

* rename dialog.md to feature-dialog.md

* remove bold from additional feature state text

_sass/_base.sass

@@ -968,8 +968,8 @@ dd
 		//font-weight: 700
 		text-decoration: underline
 
-	a:visited
-		color: blueviolet
+//	a:visited
+//		color: blueviolet
 
 	a.button
 		border-radius: 2px
@@ -1305,6 +1305,56 @@ $feature-box-div-margin-bottom: 40px
 			width: 100%
 			height: 100%
 
+// Dialog
+.ui-icon
+	display: inline-block !important
+
+#feature-state-dialog-link
+	text-decoration: none !important
+	padding: 6px !important
+	a:visited
+		color: #454545 !important
+	a code
+		display: inline-block !important
+		box-sizing: border-box !important
+		background-color: #f7f7f7 !important
+		color: #303030 !important
+		font-family: "Roboto Mono", monospace !important
+		vertical-align: baseline !important
+		font-size: 14px !important
+		font-weight: bold !important
+		padding: 0px 4px !important
+
+#feature-state-dialog
+	background: #fff !important
+	border: 1px solid #ddd !important
+	padding: 0.5em 1em !important
+
+	ul, li
+		list-style: disc !important
+		margin: 4px 12px !important
+
+	p
+		margin: 8px 0px !important
+
+	code
+		display: inline-block !important
+		box-sizing: border-box !important
+		background-color: #f7f7f7 !important
+		color: #303030 !important
+		font-family: "Roboto Mono", monospace !important
+		vertical-align: baseline !important
+		font-size: 14px !important
+		font-weight: bold !important
+		padding: 0px 4px !important
+
+.ui-dialog
+	background: #f7f7f7 !important
+	padding: 0.5em
+
+.ui-dialog-buttonpane
+	background: #f7f7f7 !important
+
 // Tabs
 .ui-widget-header
 	background: transparent !important
@@ -1321,7 +1371,6 @@ $feature-box-div-margin-bottom: 40px
 .ui-widget-content
 	border: 0px !important
 
-.ui-widget-content
 	table
 		margin: 0px !important