[Portable] Correctly set Portable PROFILEDIR on Linux
[Build] Correctly choose /usr/lib/i386-linux-gnu as LIBDIR on 32b Debian

QMAKE_HOST.arch is empty on x86
Add application category for OS X

Because /Applications is typically not subfoldered (updaters don't like it when it is) OS X has had a separate view option View --> Arrange By --> Application Category which simplifies viewing apps. Unfortunately if LSApplicationCategoryType is missing from the app's info.plist, the app will be sorted into "Other" at the bottom. public.app-category.productivity is the category for web browsers.
[MainApp] Open a new window when starting app while already running

This is e379b1b655710700d3f3785ed05d0b0d0b79e547 from master
[Windows] Load font.tff (if exists) and set it as default font

This is needed for N'ko translation as default Windows fonts
doesn't contain glyphs for N'ko language.
[ComboTabBar] Correctly switch tabs when closing last tab in tabbar

Also remove custom logic for SelectPreviousTab on tab remove and use
only the QTabBar's selectionBehaviorOnRemove

Conflicts:
	src/lib/tools/combotabbar.cpp
	src/lib/webview/tabwidget.cpp
	src/lib/webview/tabwidget.h
[TabBar] Show add tab button at correct position when there are no normal tabs
[ComboTabBar] Draw tabbar base even when main tabbar is empty
[Build] Link to execinfo also with OpenBSD

[ci skip]
[WebInspector] Add F12 shortcuto to show Web Inspector
Updated CHANGELOG