New features/fixes that are found only in master in contrast with the current stable version

#### Version (master)

* user option to define which panel/dock will have the highest priority for global shortcuts
* user option to define per panel/dock if unified global shortcuts will used for applets or not
* enforce specific ratio for dock settings window in order to look the same between different fonts
* user option to scale up/dock the dock settings window through Meta+Wheel at its empty areas
* identify automatically which unified global shortcuts have defined by the user
* user option to forward Meta event to Latte in order to show application launcher
* add a new Meta badge to identify the application launcher that will be triggered from the Meta event

* fix: dock settings visual inconsistencies between different pages