Fix jitter at specific screen sizes during scan

simulation_guide.md

@@ -60,13 +60,4 @@ For a step-by-step demonstration, watch the [full video walkthrough on running t
 
 ---
 
-### Screen Size
-
-* During a Smart Scan (performed in the **Slide Scan tab**), some screen sizes can cause unwanted jitter as shown in the animation below.
-* If this happens, change the size of your window until the UI stabilises.
-
-    ![Jitter in the OFM Simulator caused by screen size](/docs/images/ofm_sim_jitter.gif "Jitter in the OFM Simulator caused by screen size")
-
----
-
 If you need further help, reach out to the community on the [OpenFlexure Forum](https://openflexure.discourse.group/).

webapp/src/App.vue

@@ -331,6 +331,7 @@ html {
 .control-component {
   overflow-y: auto;
   overflow-x: hidden;
+  scrollbar-gutter: stable;
   width: 300px;
   height: 100%;
   padding: 0;