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

#### Version (master)

* dynamic background can now identify distorted backgrounds in order to inform the containment
to draw proper contrasted panel background underneath
* support new Advanced mode for View settings that fills all screen height
* Tasks left click and hover event gain their own options in order for the user to choose
their behavior
* support Plasma 5.15 new Virtual Desktops interface
* support fill(s) applets for Left,Center,Right alignment properly. That means that the user can now add plasma taskmanagers in Latte panel/docks and use at the same time the previous alignments.
* drag/maximize/restore active window from panel empty areas
* provide a light and dark version of current plasma theme color scheme
* support plasma themes roundness through text file or from preferences
* add a new Communicator item in order to handle all communications between containment and its applets
* support new painting based on active window color scheme
* 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