Hide expand arrows when rooms are filtering

Any account with matching rooms is expanded until there is no more
active filter.

src/qml/SidePane/AccountDelegate.qml

@@ -8,9 +8,10 @@ Column {
     spacing: theme.spacing / 2
 
     opacity:
-        paneToolBar.roomFilter && roomList.model.count < 1 ? 0.35 : 1
+        paneToolBar.roomFilter && roomList.model.count < 1 ? 0.3 : 1
     Behavior on opacity { HNumberAnimation {} }
 
+    property bool forceExpand: paneToolBar.roomFilter && roomList.model.count
     property bool expanded: true
     readonly property var modelItem: model
 
@@ -59,6 +60,7 @@ Column {
 
             ExpandButton {
                 id: expandButton
+                opacity: paneToolBar.roomFilter ? 0 : 1
                 expandableItem: accountDelegate
                 Layout.preferredHeight: row.height
             }
@@ -69,7 +71,9 @@ Column {
         id: roomList
         visible: height > 0
         width: parent.width
-        height: childrenRect.height * (accountDelegate.expanded ? 1 : 0)
+        height:
+            childrenRect.height *
+            (accountDelegate.expanded || accountDelegate.forceExpand ? 1 : 0)
         clip: heightAnimation.running
 
         userId: modelItem.user_id

src/qml/SidePane/ExpandButton.qml

@@ -10,10 +10,14 @@ HUIButton {
     backgroundColor: "transparent"
     onClicked: expandableItem.expanded = ! expandableItem.expanded
 
+    visible: opacity > 0
+    opacity: expandableItem.forceExpand ? 0 : 1
+    Behavior on opacity { HNumberAnimation {} }
+
     iconTransform: Rotation {
         origin.x: expandButton.iconDimension / 2
         origin.y: expandButton.iconDimension / 2
-        angle: expandableItem.expanded ? 90 : 180
+        angle: expandableItem.expanded || expandableItem.forceExpand ? 90 : 180
         Behavior on angle { HNumberAnimation {} }
     }
 }