SimpleChatTCRV:UICleanup: PopOver, Reasoning bubble

Now popover menu autocloses faster, so that it doesnt distract the
user too long, if not needed.

Reasoning bubble dashed border has been made thinner, so that it
appears pleasant and not over bearing.

tools/server/public_simplechat/simplechat.css

@@ -84,6 +84,7 @@ body {
     overflow-wrap: break-word;
     word-break: break-word;
     hyphens: auto;
+    border-width: thin;
 }
 .chat-message-toolcall {
     border-style: solid;

tools/server/public_simplechat/simplechat.js

@@ -1027,7 +1027,7 @@ class MultiChatUI {
 
         this.TimePeriods = {
             ToolCallAutoSecsTimeUnit: 1000,
-            PopoverCloseTimeout: 8000,
+            PopoverCloseTimeout: 4000,
         }
 
         this.timers = {