Use the nheko spinner everywhere

resources/qml/MessageInput.qml

@@ -4,6 +4,7 @@
 
 import "./emoji"
 import "./voip"
+import "./ui"
 import QtQuick 2.12
 import QtQuick.Controls 2.3
 import QtQuick.Layouts 1.2
@@ -90,8 +91,9 @@ Rectangle {
                 color: Nheko.colors.window
                 visible: room && room.input.uploading
 
-                NhekoBusyIndicator {
-                    anchors.fill: parent
+                Spinner {
+                    anchors.centerIn: parent
+                    height: parent.height / 2
                     running: parent.visible
                 }
 

resources/qml/NhekoBusyIndicator.qml

-// SPDX-FileCopyrightText: Nheko Contributors
-//
-// SPDX-License-Identifier: GPL-3.0-or-later
-
-import QtQuick 2.9
-import QtQuick.Controls 2.3
-import QtQuick.Layouts 1.2
-import im.nheko 1.0
-
-BusyIndicator {
-    id: control
-
-    contentItem: Item {
-        implicitWidth: 64
-        implicitHeight: 64
-
-        Item {
-            id: item
-
-            height: Math.min(parent.height, parent.width)
-            width: height
-            opacity: control.running ? 1 : 0
-
-            RotationAnimator {
-                target: item
-                running: control.visible && control.running
-                from: 0
-                to: 360
-                loops: Animation.Infinite
-                duration: 2000
-            }
-
-            Repeater {
-                id: repeater
-
-                model: 6
-
-                Rectangle {
-                    implicitWidth: radius * 2
-                    implicitHeight: radius * 2
-                    radius: item.height / 8
-                    color: Nheko.colors.text
-                    opacity: (index + 2) / (repeater.count + 2)
-                    transform: [
-                        Translate {
-                            y: item.height / 2
-                        },
-                        Rotation {
-                            angle: index / repeater.count * 360
-                            origin.x: item.height / 2
-                            origin.y: item.height / 2
-                        }
-                    ]
-                }
-
-            }
-
-            Behavior on opacity {
-                OpacityAnimator {
-                    duration: 250
-                }
-
-            }
-
-        }
-
-    }
-
-}

resources/res.qrc

@@ -111,7 +111,6 @@
         <file>qml/UploadBox.qml</file>
         <file>qml/MessageInput.qml</file>
         <file>qml/MessageView.qml</file>
-        <file>qml/NhekoBusyIndicator.qml</file>
         <file>qml/PrivacyScreen.qml</file>
         <file>qml/Reactions.qml</file>
         <file>qml/ReplyPopup.qml</file>