3.5.0

POLLS: https://goo.gl/forms/7bJNr33Ii22Q1c3k2

Added:
▪ All application resources (skins, icons, ...) are now compiled into the executable file. This allows for easier deployment.
▪ "Add account" dialog is displayed when app is launched and no accounts exist so far.
▪ New plugin for Inoreader. This is supported only in full RSS Guard "web-engine" version, because of web OAuth 2.0. The new plugins is in EXPERIMENTAL phase, expect errors and report them.
▪ NextCloud plugin now allows to persistently set max number of messages to get downloaded per feed.
▪ Added support for arbitrary external tools (settings category "Web browser & e-mail & proxy") which can open URLs of selected messages. (#136)
▪ Standard account is now automatically added if RSS Guard is started with empty database.
▪ Menu action "Select next unread message" in "Messages" menu now works across all feeds, so user can navigate through all unread messages with a sigle keyboard shortcut. (#132, #6)
▪ Added two bindable menu actions (in menu "Web browser & tabs") which allow to cycle among tabs. (#6)

Fixed:
▪ Fixed build on some Unit-like operating systems.