[kylin-nm]Open the network tool and a "Network Tools" window will appear on the taskbar.

[liumin]

version:kylin-nm 1.0.0-1
system:ubuntukylin 19.04-daily

testcase:
1、Click the taskbar network connection icon
2、A "Network Tools" window pops up on the taskbar
点击右下角网络工具图标，任务栏会出现一个“网络工具”窗口

expected result：passed
actual result：A "Network Tools" window pops up on the taskbar

[Shine Huang (shine)]

qt本身机制决定无法去掉这个任务栏窗口，去掉的话右键点击托盘的事件会有各种问题，或者点不开。取舍之下采用了这种方案。