DNET: More fixes and feedback (#2489)

* Add some re-rendering improvements to avoid the canvas and visual servers getting desynched

* removed underlevelled nerf to low-level servers; improved charisma level docs

* Remove offscreen dynamic culling

* PR feedback; add cache file names to tooltip

* Ensure stasis link servers get loaded properly; ensure darkweb has neighbors to prevent unit tests from failing; remove extra optional chaining accessors

test/jest/Netscript/Darknet.test.ts

@@ -71,7 +71,7 @@ function getNsOnServerNearLabyrinth() {
       (hostname) => hostname !== SpecialServers.Home && hostname !== SpecialServers.DarkWeb,
     );
     if (!server) {
-      clearDarknet(true);
+      clearDarknet();
       populateDarknet();
     }
   }