Release 1.7.4

[kaylagalway]

Release 1.7.4 will include bug fixes and important Glean changes. Description of all changes below:

Additions: Updated Glean and Application Services. Added Glean scripts for sending user data delete ping.

All changes since version 1.7.3:

• Update Glean and delete ping(Add the legacy telemetry client id to the deletion request ping #1212)
• Update application services and Xcode(Update Xcode to 11.4.1 #1214)
• Handle deletion of default browser(Browser selection is not reset after deleting the preferred browser #1124, "Open websites in" - Selected browser is not unselected after uninstalling it #361)
• Tableview scrolls to the top when backgrounded(Entries section list is not auto-scrolled to the top after resuming Lockwise #1133, There is a space left at the top of the entries screen after a home button interrupt (while reloading) #1205)

Beta edit feature fixes hidden behind feature flag:

• Disabled ability to edit hostname(Fixed Issue #1151: Disabled ability to edit web address #1216)
• Cancel button in edit mode no longer shows back arrow(Fixed Issue #1082: Cancel button in edit mode no longer shows back arrow #1230)

To Do

• Need to merge Glean PR Glean delete ping #1237
• Need to merge release notes Release notes for version 1.7.4 #1239
• Need to create a PI request once the Glean work is merged
• After approved PI request, need to submit build for release on itunes connect
• Upload build to sentry