Consider refactoring Page Action menu options

[SimonBasca]

Steps to reproduce:

1. Set Firefox as default browser
2. Open Focus
3. Go to google.com
4. Open the page action menu (three dot menu)

Actual results:

• The following options are presented:

1. Open in Firefox
2. Open in Chrome
3. Open in Safari

Expected results:

• We should refactor the Page Action menu as from iOS 14.x we can set the desired default browser and this options are redundant.

Note:

• Related issue: Rename "Open in Safari" to "Open in Default Browser" #1856