[webui] Support for bulk server upload (add or update) by tab-separated-value file. (v2)

Users can upload multiple servers by tab-separated-value file.

Example for Zabbix (without "|	"s):
|	#ID	nickname	ipAddress	hostName	port	userName	password	pollingInterval	retryInterval
|	 	test1	::1	ip6-localhost	8000	hatohol	hogehoge
|		test2	127.0.0.1	localhost	8000	hatohol	hogehoge

Signed-off-by: YOSHIFUJI Hideaki <hideaki.yoshifuji@miraclelinux.com>
The variable "div" is used before the declaration "var div", although there is no problem in this case.
"var" is also affected to this variable because the scope of "var" is a function.