As we still support older versions of Qt, this moves to load
the MultiEffect (blurring specifically) dynamically and avoids
the entire project failing if the effects module is not found.
The effects module was introduced in Qt6.5
For desktop we now properly support starting a payment when
the user clicks on a bitcoincash link in a browser.
For Android the activation logic _should_ work, except that the
Android specific way has yet to be tied to our app.
The PaymentProtcol class now handles the pasting of a payment uri,
like bip21.
Additionally this adds the feature where we pass in the payment uri on
the commandline which then results in an auto-opened payment screen.
In Qt5 the palette was introduced in the Control object (part of Qt-
Quick-Controls-2).
In Qt6 this property was moved to the superclass 'Item'.
This means that we no longer need to refer to a control when using a
palette, every single thing in QtQuick is an Item, afterall.
This gives the dark-theme a make-over with better colors, more colors
coming from the palette and this makes the conceptual usage between the
mobile and desktop clients of colors to be in-line.
The 'text' and 'windowText' were both used like they were the same
thing, which they currently are but don't have to be.
Now migrate the various cases where to we use 'text' to 'windowText'.
This choice is made because the Label object uses windowText by default.
In future we might want to make the 'text' one have a slightly different
color. Its still used in Qt components like the popup menu.
tomFlowee