BUG tab bar rendering issue
bug

at upper left corner,tab name and original window contents are overlaping eatch over
windows version 1803
build 17134.228
and there are some suggestions for visual style,the "+" and ":" button on the right side of the tabs are too big or too bold,they don‘t mix well with original windows style ,you could make them thinner、smaller。and in the other mode,when tabs alwasy place above the window,the background color looks ugly on win10,it should be flat-gray color on win10 system(just like chrome tabs),or make flatten style as an option on setting pannel.
