disable call for now + fix left pane actions overflow (#2085)

preload.js

@@ -38,7 +38,7 @@ window.isBehindProxy = () => Boolean(config.proxyUrl);
 window.lokiFeatureFlags = {
   useOnionRequests: true,
   useMessageRequests: false,
-  useCallMessage: true,
+  useCallMessage: false,
 };
 
 window.isBeforeVersion = (toCheck, baseVersion) => {

ts/components/leftpane/LeftPaneSectionContainer.tsx

@@ -6,6 +6,7 @@ export const LeftPaneSectionContainer = styled.div`
   flex-direction: column;
   align-items: center;
   border-right: var(--border-session);
+  overflow-y: auto;
 
   .session-icon-button {
     padding: 30px 0;