[sailfish-browser] Fix cyclic link from tab history. Fixes JB#17002

When navigating never update existing link, instead always
create a new link.
[sailfish-browser] Update first use into new design. Fixes JB#17160
Merge pull request #38 from veskuh/update-user-agent

[sailfish-browser] Update user agent to match gecko version. Contributes...
no opacity change needed for bottom text
change to word wrap on first use items
fix icon size, change visibility
Merge pull request #35 from sailfishos/jb17002

[sailfish-browser] Fix cyclic link from tab history. Fixes JB#17002
Merge pull request #39 from veskuh/first-use-update

[sailfish-browser] Update first use into new design. Fixes JB#17160
[sailfish-browser] clean view on last tab closed. Fixes JB#15971