libs/cbi: support horizontal display for radio button groups

libs/cbi/luasrc/view/cbi/full_valuefooter.htm

@@ -14,7 +14,7 @@ $Id$
 -%>
 
 		<% if self.description and #self.description > 0 then -%>
-			<% if not luci.util.instanceof( self, luci.cbi.Flag ) then -%>
+			<% if not luci.util.instanceof( self, luci.cbi.Flag ) or self.orientation ~= "horizontal" then -%>
 				<br />
 			<%- end %>
 			<div class="cbi-value-description">

libs/cbi/luasrc/view/cbi/lvalue.htm

@@ -26,7 +26,7 @@ $Id$
 %>
 	<input class="cbi-input-radio" onclick="cbi_d_update(this.id)" onchange="cbi_d_update(this.id)" type="radio"<%= attr("id", cbid..c) .. attr("name", cbid) .. attr("value", key) .. ifattr(self:cfgvalue(section) == key, "checked", "checked") %> />
 	<label<%= attr("for", cbid..c) %>><%=self.vallist[i]%></label>
-<% if c == self.size then c = 0 %><br />
+<% if c == self.size then c = 0 %><% if self.orientation == "horizontal" then %>&nbsp;<% else %><br /><% end %>
 <% end end %>
 <% end %>
 <%+cbi/valuefooter%>

modules/admin-full/luasrc/model/cbi/admin_network/wifi.lua

@@ -70,11 +70,11 @@ end
 
 if hwtype == "mac80211" then
 	tp = s:taboption("general",
-		(#tx_powers > 0) and ListValue or Value,
+		(tx_powers and #tx_powers > 0) and ListValue or Value,
 		"txpower", translate("a_w_txpwr"), "dBm")
 
 	tp.rmempty = true
-	for _, p in ipairs(iw.txpwrlist) do
+	for _, p in ipairs(iw and iw.txpwrlist or {}) do
 		tp:value(p.dbm, "%i dBm (%i mW)" %{ p.dbm, p.mw })
 	end
 end
@@ -107,6 +107,7 @@ if hwtype == "atheros" then
 	if not nsantenna then
 		ant1 = s:taboption("advanced", ListValue, "txantenna", translate("wifi_txantenna"))
 		ant1.widget = "radio"
+		ant1.orientation = "horizontal"
 		ant1:depends("diversity", "")
 		ant1:value("0", translate("wifi_auto"))
 		ant1:value("1", translate("wifi_ant1", "Antenna 1"))
@@ -114,6 +115,7 @@ if hwtype == "atheros" then
 
 		ant2 = s:taboption("advanced", ListValue, "rxantenna", translate("wifi_rxantenna"))
 		ant2.widget = "radio"
+		ant2.orientation = "horizontal"
 		ant2:depends("diversity", "")
 		ant2:value("0", translate("wifi_auto"))
 		ant2:value("1", translate("wifi_ant1", "Antenna 1"))