Change completer limit to 30. Make up/down scroll listview

resources/qml/Completer.qml

@@ -11,7 +11,7 @@ import im.nheko 1.0
 Popup {
     id: popup
 
-    property int currentIndex: -1
+    property alias currentIndex: listView.currentIndex
     property string completerName
     property var completer
     property bool bottomToTop: true
@@ -96,6 +96,7 @@ Popup {
         verticalLayoutDirection: popup.bottomToTop ? ListView.BottomToTop : ListView.TopToBottom
         spacing: rowSpacing
         pixelAligned: true
+        highlightFollowsCurrentItem: true
 
         delegate: Rectangle {
             property variant modelData: model

src/CompletionProxyModel.h

@@ -151,7 +151,7 @@ class CompletionProxyModel : public QAbstractProxyModel
 public:
     CompletionProxyModel(QAbstractItemModel *model,
                          int max_mistakes       = 2,
-                         size_t max_completions = 70,
+                         size_t max_completions = 30,
                          QObject *parent        = nullptr);
 
     void invalidate();