uiux(Settings): add slider to control audio volume

Closes #843

ui/app/AppLayouts/Chat/ChatColumn/ChatInput.qml

@@ -23,7 +23,7 @@ Rectangle {
     Audio {
         id: sendMessageSound
         source: "../../../../sounds/send_message.wav"
-        volume: 0.2
+        volume: appSettings.volume
     }
 
     function interpretMessage(msg) {

ui/app/AppLayouts/Profile/Sections/SoundsContainer.qml

@@ -3,13 +3,14 @@ import QtQuick.Controls 2.13
 import QtQuick.Layouts 1.13
 import "../../../../imports"
 import "../../../../shared"
+import "../../../../shared/status"
 
 Item {
     id: soundsContainer
-    width: 200
+    anchors.right: parent.right
-    height: 200
+    anchors.rightMargin: contentMargin
-    Layout.fillHeight: true
+    anchors.left: parent.left
-    Layout.fillWidth: true
+    anchors.leftMargin: contentMargin
 
     StyledText {
         id: element5
@@ -22,4 +23,26 @@ Item {
         font.weight: Font.Bold
         font.pixelSize: 20
     }
+
+    StyledText {
+        id: labelVolume
+        anchors.top: element5.bottom
+        anchors.topMargin: Style.current.bigPadding
+        text: qsTrId("Sound volume") + " " + volume.value
+        font.pixelSize: 15
+    }
+
+    StatusSlider {
+        id: volume
+        anchors.top: labelVolume.bottom
+        anchors.topMargin: Style.current.padding
+        minimumValue: 0.0
+        maximumValue: 1.0
+        value: appSettings.volume
+        stepSize: 0.1
+        onValueChanged: {
+            appSettings.volume = volume.value
+        }
+    }
+
 }

ui/main.qml

@@ -47,13 +47,14 @@ ApplicationWindow {
         id: sendMessageSound
         audioRole: Audio.NotificationRole
         source: "../../../../sounds/send_message.wav"
+        volume: appSettings.volume
     }
 
     Audio {
         id: notificationSound
         audioRole: Audio.NotificationRole
         source: "../../../../sounds/notification.wav"
-        volume: 0.2
+        volume: appSettings.volume
     }
 
     signal settingsLoaded()
@@ -68,6 +69,7 @@ ApplicationWindow {
         property bool compactMode
         property string locale: "en"
         property var recentEmojis: []
+        property real volume: 0.2
     }
     Connections {
         target: profileModel