Fix some memory / threading issues

[msaps]

• 187 Remove use of unowned self and replace with weak self.

• 176 Make user interface direction detection thread safe.

[uias-bot]

	1 Warning
:warning:	Looks like you changed some source files, should there have been some tests added?

SwiftLint found issues

Warnings

File	Line	Reason
PageboyViewController+Management.swift	13	Lines should not have trailing whitespace.
PageboyViewController+Management.swift	20	Lines should not have trailing whitespace.
PageboyViewController+Management.swift	40	Lines should not have trailing whitespace.
PageboyViewController+Management.swift	50	Lines should not have trailing whitespace.
PageboyViewController+Management.swift	70	Lines should not have trailing whitespace.
PageboyViewController+Management.swift	98	Lines should not have trailing whitespace.
PageboyViewController+Management.swift	111	Lines should not have trailing whitespace.
PageboyViewController+Management.swift	117	Lines should not have trailing whitespace.
PageboyViewController+Management.swift	132	Lines should not have trailing whitespace.
PageboyViewController+Management.swift	148	Lines should not have trailing whitespace.
PageboyViewController+Management.swift	150	Lines should not have trailing whitespace.
PageboyViewController+Management.swift	162	Lines should not have trailing whitespace.
PageboyViewController+Management.swift	169	Lines should not have trailing whitespace.
PageboyViewController+Management.swift	191	Lines should not have trailing whitespace.
PageboyViewController+Management.swift	197	Lines should not have trailing whitespace.
PageboyViewController+Management.swift	200	Lines should not have trailing whitespace.
PageboyViewController+Management.swift	210	Lines should not have trailing whitespace.
PageboyViewController+Management.swift	218	Lines should not have trailing whitespace.
PageboyViewController+Management.swift	223	Lines should not have trailing whitespace.
PageboyViewController+Management.swift	227	Lines should not have trailing whitespace.
PageboyViewController+Management.swift	237	Lines should not have trailing whitespace.
PageboyViewController+Management.swift	241	Lines should not have trailing whitespace.
PageboyViewController+Management.swift	252	Lines should not have trailing whitespace.
PageboyViewController+Management.swift	268	Lines should not have trailing whitespace.
PageboyViewController+Management.swift	109	Opening braces should be preceded by a single space and on the same line as the declaration.
PageboyViewController+Management.swift	86	Limit vertical whitespace to a single empty line. Currently 2.
PageboyViewController+Management.swift	106	Line should be 120 characters or less: currently 135 characters
UIView+Localization.swift	12	Lines should not have trailing whitespace.
UIView+Localization.swift	25	Lines should not have trailing whitespace.
UIView+Localization.swift	30	Lines should not have trailing whitespace.

Generated by :no_entry_sign: Danger