Turn Clipboard into a singleton

src/gui/Base/HSelectableLabelContainer.qml

@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: LGPL-3.0-or-later
 
 import QtQuick 2.12
+import Clipboard 0.1
 
 FocusScope {
     signal deselectAll()

src/gui/GlobalShortcuts.qml

@@ -2,6 +2,7 @@
 
 import QtQuick 2.12
 import QtQuick.Controls 2.12
+import Clipboard 0.1
 import "Base"
 
 Item {

src/gui/MainPane/AccountDelegate.qml

@@ -2,6 +2,7 @@
 
 import QtQuick 2.12
 import QtQuick.Layouts 1.12
+import Clipboard 0.1
 import "../Base"
 
 HTileDelegate {

src/gui/MainPane/RoomDelegate.qml

@@ -2,6 +2,7 @@
 
 import QtQuick 2.12
 import QtQuick.Layouts 1.12
+import Clipboard 0.1
 import "../Base"
 
 HTileDelegate {

src/gui/Pages/Chat/Composer.qml

@@ -2,6 +2,7 @@
 
 import QtQuick 2.12
 import QtQuick.Layouts 1.12
+import Clipboard 0.1
 import "../../Base"
 import "../../Dialogs"
 

src/gui/Pages/Chat/RoomPane/MemberDelegate.qml

@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: LGPL-3.0-or-later
 
 import QtQuick 2.12
+import Clipboard 0.1
 import "../../../Base"
 
 HTileDelegate {

src/gui/Pages/Chat/Timeline/EventDelegate.qml

@@ -2,6 +2,7 @@
 
 import QtQuick 2.12
 import QtQuick.Layouts 1.12
+import Clipboard 0.1
 import "../../../Base"
 
 HColumnLayout {