By creating a DBus connection per player, we are able to support
multiple remote players.

The album art is not yet supported.

Accomplishes task T11851

Summary:
This patch makes the "devilces unavailable" page follow the general style used in other
similar views throughout Plasma and other KDE software. It also improves the wording
of various buttons and headers to make them more context-sensitive and thus more relevant
to what the user needs to do to solve the problem.

Test Plan:
{F8149680}

{F8149679}

Reviewers:
#VDG, #kde-connect

Subscribers:

In case of conflict in i18n, keep the version of the branch "ours"
To resolve a particular conflict, "git checkout --ours path/to/file.desktop"

In case of conflict in i18n, keep the version of the branch "ours"
To resolve a particular conflict, "git checkout --ours path/to/file.desktop"

In case of conflict in i18n, keep the version of the branch "ours"
To resolve a particular conflict, "git checkout --ours path/to/file.desktop"

Summary:
Change the three dotted menu to use PlasmaComponents ContextMenu.
This prevents menu from staying open on other system tray's applets.
Wayland still has that issue, happens in other menus too.
BUG: 415142

And change menu icon into a hamburger menu.

Test Plan:
Before:
Open the menu, and then open an other applet. Menu will stay open on
the left. Even if change windows and open the system tray, will still
be there.
After:
Use X11. By clicking, for example volume applet, menu will minimize.
Will need to click again to open the applet.

In case of conflict in i18n, keep the version of the branch "ours"
To resolve a particular conflict, "git checkout --ours path/to/file.desktop"

Update shareplugin.cpp: added code snippet to check the open condition of the received network package and to act accordingly.

In case of conflict in i18n, keep the version of the branch "ours"
To resolve a particular conflict, "git checkout --ours path/to/file.desktop"

In case of conflict in i18n, keep the version of the branch "ours"
To resolve a particular conflict, "git checkout --ours path/to/file.desktop"

In case of conflict in i18n, keep the version of the branch "ours"
To resolve a particular conflict, "git checkout --ours path/to/file.desktop"