Make it clearer which tab is selected in search modal

[lucacasonato]

Currently the selected item is just highlighed very subtly using a slightly different text color. There should be a clearer distinction, for example by having an underline on the selected tab.

[crowlKats]

There is an underline though.

[lucacasonato]

There is no underline:

[crowlKats]

interesting:

[crowlKats]

this seems to happen on chrome & safari (in ff it doesnt):

[danyalasif]

I have tested this a bit and it always gives the INJECT_CSS_ERROR on chrome, I was able to fix this by using border directly to give the underline and remove the css call.

Is this issue open for PR?