Browser opening leaves url bar empty if the internal url is invalid

[HiWord9]

If browser was opened internaly on invalid url, the url bar becomes empty.
It can be reproduced by changing the default page to invalid url.

I found it while i was creating my pull request #3 in which i added ability to open browser with non-default page by command.
Firstly i thought it was bug that i've created, but then i've tested it the way i mentioned earlyer and got sure i had not.

[HiWord9]

commit 1e345d9 does not solves the problem, the bug is still here. The problem is somewhere on calling BrowserScreen, not on which request u give to it. When u type incorrect url in urlBox it firstly tryes to reach it, and after fail sets the urlBox to what u've been writing to it. So the thing where it sets text to urlBox does not calls on entering incorrect url manually, not by typing it by keuboard.