luci-base: do not render section description tag when description is empty
luci-base: do not render section description tag when description is empty

Signed-off-by: Jo-Philipp Wich <a9275913d515487ffaed469337a530ed202da558@openwrt.org>

Noltari/luci,mumuqz/luci,aa65535/luci,teslamint/luci,shangjiyu/luci-with-extra,oneru/luci,daofeng2015/luci,rogerpueyo/luci,lbthomsen/openwrt-luci,hnyman/luci,shangjiyu/luci-with-extra,Wedmer/luci,nmav/luci,cshore/luci,openwrt-es/openwrt-luci,artynet/luci,openwrt-es/openwrt-luci,kuoruan/lede-luci,981213/luci-1,daofeng2015/luci,taiha/luci,Wedmer/luci,openwrt/luci,chris5560/openwrt-luci,Noltari/luci,nmav/luci,cappiewu/luci,cshore/luci,remakeelectric/luci,rogerpueyo/luci,NeoRaider/luci,kuoruan/lede-luci,tobiaswaldvogel/luci,nmav/luci,aa65535/luci,openwrt-es/openwrt-luci,cshore-firmware/openwrt-luci,chris5560/openwrt-luci,cshore-firmware/openwrt-luci,remakeelectric/luci,shangjiyu/luci-with-extra,jlopenwrtluci/luci,cappiewu/luci,chris5560/openwrt-luci,daofeng2015/luci,wongsyrone/luci-1,hnyman/luci,wongsyrone/luci-1,lbthomsen/openwrt-luci,Noltari/luci,tobiaswaldvogel/luci,cappiewu/luci,kuoruan/lede-luci,taiha/luci,jlopenwrtluci/luci,mumuqz/luci,bittorf/luci,shangjiyu/luci-with-extra,bright-things/ionic-luci,kuoruan/luci,bright-things/ionic-luci,artynet/luci,taiha/luci,daofeng2015/luci,rogerpueyo/luci,openwrt/luci,jlopenwrtluci/luci,oneru/luci,nmav/luci,bittorf/luci,bright-things/ionic-luci,remakeelectric/luci,mumuqz/luci,openwrt/luci,nmav/luci,Wedmer/luci,kuoruan/luci,rogerpueyo/luci,teslamint/luci,ollie27/openwrt_luci,Noltari/luci,981213/luci-1,artynet/luci,openwrt/luci,wongsyrone/luci-1,cappiewu/luci,mumuqz/luci,LuttyYang/luci,oneru/luci,tobiaswaldvogel/luci,chris5560/openwrt-luci,mumuqz/luci,NeoRaider/luci,kuoruan/lede-luci,bittorf/luci,NeoRaider/luci,mumuqz/luci,wongsyrone/luci-1,ollie27/openwrt_luci,taiha/luci,wongsyrone/luci-1,daofeng2015/luci,daofeng2015/luci,taiha/luci,tobiaswaldvogel/luci,tobiaswaldvogel/luci,nmav/luci,chris5560/openwrt-luci,cshore/luci,Noltari/luci,LuttyYang/luci,artynet/luci,openwrt/luci,cshore-firmware/openwrt-luci,nmav/luci,ollie27/openwrt_luci,cshore-firmware/openwrt-luci,teslamint/luci,artynet/luci,wongsyrone/luci-1,remakeelectric/luci,mumuqz/luci,kuoruan/luci,jlopenwrtluci/luci,bright-things/ionic-luci,Wedmer/luci,jlopenwrtluci/luci,mumuqz/luci,kuoruan/lede-luci,teslamint/luci,Wedmer/luci,bittorf/luci,bright-things/ionic-luci,wongsyrone/luci-1,taiha/luci,shangjiyu/luci-with-extra,rogerpueyo/luci,teslamint/luci,lbthomsen/openwrt-luci,bittorf/luci,cappiewu/luci,daofeng2015/luci,oneru/luci,kuoruan/lede-luci,LuttyYang/luci,lbthomsen/openwrt-luci,Wedmer/luci,oneru/luci,cshore/luci,shangjiyu/luci-with-extra,cshore-firmware/openwrt-luci,jlopenwrtluci/luci,remakeelectric/luci,kuoruan/luci,chris5560/openwrt-luci,bright-things/ionic-luci,taiha/luci,bittorf/luci,openwrt-es/openwrt-luci,openwrt/luci,cappiewu/luci,ollie27/openwrt_luci,LuttyYang/luci,bittorf/luci,hnyman/luci,981213/luci-1,rogerpueyo/luci,LuttyYang/luci,LuttyYang/luci,cshore/luci,hnyman/luci,chris5560/openwrt-luci,artynet/luci,cappiewu/luci,LuttyYang/luci,kuoruan/lede-luci,kuoruan/lede-luci,openwrt/luci,artynet/luci,oneru/luci,nmav/luci,hnyman/luci,cshore-firmware/openwrt-luci,shangjiyu/luci-with-extra,artynet/luci,rogerpueyo/luci,oneru/luci,aa65535/luci,lbthomsen/openwrt-luci,remakeelectric/luci,Noltari/luci,981213/luci-1,teslamint/luci,teslamint/luci,openwrt-es/openwrt-luci,981213/luci-1,lbthomsen/openwrt-luci,jlopenwrtluci/luci,ollie27/openwrt_luci,taiha/luci,teslamint/luci,aa65535/luci,hnyman/luci,openwrt-es/openwrt-luci,NeoRaider/luci,kuoruan/luci,cshore/luci,cshore-firmware/openwrt-luci,aa65535/luci,chris5560/openwrt-luci,kuoruan/luci,aa65535/luci,lbthomsen/openwrt-luci,wongsyrone/luci-1,cshore/luci,hnyman/luci,tobiaswaldvogel/luci,Noltari/luci,Wedmer/luci,lbthomsen/openwrt-luci,981213/luci-1,ollie27/openwrt_luci,daofeng2015/luci,NeoRaider/luci,ollie27/openwrt_luci,openwrt-es/openwrt-luci,openwrt/luci,981213/luci-1,jlopenwrtluci/luci,nmav/luci,bright-things/ionic-luci,bright-things/ionic-luci,Noltari/luci,bittorf/luci,NeoRaider/luci,Noltari/luci,NeoRaider/luci,tobiaswaldvogel/luci,Wedmer/luci,openwrt-es/openwrt-luci,hnyman/luci,LuttyYang/luci,cshore/luci,cappiewu/luci,NeoRaider/luci,rogerpueyo/luci,cshore-firmware/openwrt-luci,kuoruan/luci,aa65535/luci,remakeelectric/luci,kuoruan/luci,remakeelectric/luci,oneru/luci,tobiaswaldvogel/luci,artynet/luci,shangjiyu/luci-with-extra,ollie27/openwrt_luci,aa65535/luci