Fix watch add focus and bump build to 21

[diogot]

As the title says

[diogot-bot]

	1 Warning
:warning:	Total coverage less than 80%

Generated by :no_entry_sign: Danger

[codecov-io]

Codecov Report

Merging #147 into development will increase coverage by 6.5%. The diff coverage is n/a.

@@              Coverage Diff               @@
##           development     #147     +/-   ##
==============================================
+ Coverage        63.65%   70.16%   +6.5%     
==============================================
  Files               51       43      -8     
  Lines             2449     2222    -227     
  Branches            48       48             
==============================================
  Hits              1559     1559             
+ Misses             889      662    -227     
  Partials             1        1

Impacted Files	Coverage Δ
...ension/AddInterfaceController/MassPickerItem.swift
...eController/ListInterfaceControllerViewModel.swift
...ceController/AddInterfaceControllerViewModel.swift
...xtension/Complication/ComplicationController.swift
Watch Extension/Generated/L10n.swift
Watch Extension/ExtensionDelegate.swift
...tInterfaceController/ListInterfaceController.swift

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