luci-base: emit a warning if cbi() delegates a SimpleForm instance
luci-base: emit a warning if cbi() delegates a SimpleForm instance

Signed-off-by: Jo-Philipp Wich <bd73d35759d75cc215150d1bbc94f1b1078bee01@mein.io>

artynet/luci,981213/luci-1,hnyman/luci,kuoruan/lede-luci,nmav/luci,openwrt-es/openwrt-luci,wongsyrone/luci-1,chris5560/openwrt-luci,kuoruan/lede-luci,tobiaswaldvogel/luci,nmav/luci,wongsyrone/luci-1,kuoruan/luci,remakeelectric/luci,openwrt/luci,wongsyrone/luci-1,Noltari/luci,Noltari/luci,openwrt-es/openwrt-luci,kuoruan/luci,kuoruan/lede-luci,kuoruan/luci,lbthomsen/openwrt-luci,openwrt/luci,nmav/luci,rogerpueyo/luci,hnyman/luci,981213/luci-1,remakeelectric/luci,kuoruan/lede-luci,chris5560/openwrt-luci,openwrt/luci,kuoruan/lede-luci,chris5560/openwrt-luci,tobiaswaldvogel/luci,tobiaswaldvogel/luci,lbthomsen/openwrt-luci,openwrt-es/openwrt-luci,rogerpueyo/luci,981213/luci-1,lbthomsen/openwrt-luci,tobiaswaldvogel/luci,Noltari/luci,chris5560/openwrt-luci,remakeelectric/luci,wongsyrone/luci-1,artynet/luci,artynet/luci,chris5560/openwrt-luci,rogerpueyo/luci,openwrt-es/openwrt-luci,artynet/luci,nmav/luci,openwrt/luci,wongsyrone/luci-1,tobiaswaldvogel/luci,hnyman/luci,artynet/luci,rogerpueyo/luci,rogerpueyo/luci,981213/luci-1,Noltari/luci,kuoruan/lede-luci,kuoruan/luci,rogerpueyo/luci,nmav/luci,wongsyrone/luci-1,chris5560/openwrt-luci,nmav/luci,kuoruan/lede-luci,openwrt/luci,Noltari/luci,openwrt/luci,Noltari/luci,remakeelectric/luci,Noltari/luci,lbthomsen/openwrt-luci,tobiaswaldvogel/luci,openwrt/luci,nmav/luci,rogerpueyo/luci,kuoruan/luci,remakeelectric/luci,openwrt-es/openwrt-luci,artynet/luci,openwrt-es/openwrt-luci,tobiaswaldvogel/luci,artynet/luci,hnyman/luci,Noltari/luci,tobiaswaldvogel/luci,chris5560/openwrt-luci,wongsyrone/luci-1,Noltari/luci,openwrt/luci,rogerpueyo/luci,wongsyrone/luci-1,hnyman/luci,remakeelectric/luci,openwrt-es/openwrt-luci,artynet/luci,981213/luci-1,hnyman/luci,kuoruan/luci,remakeelectric/luci,lbthomsen/openwrt-luci,nmav/luci,artynet/luci,chris5560/openwrt-luci,981213/luci-1,openwrt-es/openwrt-luci,remakeelectric/luci,kuoruan/luci,lbthomsen/openwrt-luci,kuoruan/lede-luci,hnyman/luci,kuoruan/luci,981213/luci-1,lbthomsen/openwrt-luci,nmav/luci,lbthomsen/openwrt-luci,hnyman/luci