Add nonKineticScrollingSpeed multiplicator setting

src/backend/user_files.py

@@ -286,6 +286,7 @@ class UISettings(JSONDataFile):
             "lexicalRoomSorting": False,
             "markRoomReadMsecDelay": 200,
             "maxMessageCharactersPerLine": 65,
+            "nonKineticScrollingSpeed": 1.0,
             "ownMessagesOnLeftAboveWidth": 895,
             "theme": "Midnight.qpl",
             "writeAliases": {},

src/gui/Base/HKineticScrollingDisabler.qml

@@ -13,11 +13,14 @@ MouseArea {
         // Otherwise use wheel.angleDelta, which is available from mouses and
         // low resolution trackpads.
         // When higher pixelDelta, more scroll will be applied
+
+        const speedMultiply =
+            Qt.styleHints.wheelScrollLines *
+            window.settings.nonKineticScrollingSpeed
+
         const pixelDelta = {
-            x: wheel.pixelDelta.x ||
-               wheel.angleDelta.x / 8 * Qt.styleHints.wheelScrollLines,
-            y: wheel.pixelDelta.y ||
-               wheel.angleDelta.y / 8 * Qt.styleHints.wheelScrollLines,
+            x: wheel.pixelDelta.x || wheel.angleDelta.x / 8 * speedMultiply,
+            y: wheel.pixelDelta.y || wheel.angleDelta.y / 8 * speedMultiply,
         }
 
         // Return current position if there was not any movement