fix: slash and password copy

[DmitryEfimenko]

• closes Automatic copy on URL click #70;
• closes Use of '/' character in URL fields #68;
• fixes linting issues
• got rid of an old dependency that we used for URL validation while keeping the functionality we need

[abashmak]

Password feature works. Slash bug still present (both in new category and new item forms)

[DmitryEfimenko]

fixes are in. run yarn before building and testing

[abashmak]

One comment: after clicking on a URL to go to a site, then coming back to the application, the '/' shortcut key no longer puts the focus in the search bar. It's not a huge deal, but might be good to investigate why.

[DmitryEfimenko]

I think the issue with the "/" has been there since we've introduced copying things to clipboard because it's an issue with 3rd party library. I opened a new issue there.

I'd say thing PR can be merged. I'll let you do it though.