Scale the back button down

The hit area is still the same size, though.

resources/qml/ImageButton.qml

@@ -15,6 +15,7 @@ AbstractButton {
     property color highlightColor: Nheko.colors.highlight
     property color buttonTextColor: Nheko.colors.buttonText
     property bool changeColorOnHover: true
+    property alias imageScale: buttonImg.scale
 
     focusPolicy: Qt.NoFocus
     width: 16

resources/qml/TopBar.qml

@@ -54,6 +54,7 @@ Rectangle {
             width: Nheko.avatarSize
             height: Nheko.avatarSize
             visible: showBackButton
+            imageScale: 0.5 // because this image at full scale looks huge, tacky and distracting
             image: ":/icons/icons/ui/angle-pointing-to-left.png"
             ToolTip.visible: hovered
             ToolTip.text: qsTr("Back to room list")