fixed some bugs, dark/white mode fix and sessionid in url

codeeditor-app/elements/session-list-item/session-list-item.less

@@ -1,20 +1,32 @@
+@import url('../../../shared/theme.less');
+
 session-list-item {
-    color: white;
+    color: @primary-text-color-white;
     padding: 10px;
     display: block;
     position: relative;
-    border-bottom: 1px solid grey;
+    border-bottom: 1px solid;
+    border-color: @primary-bg-color-white;
     cursor: pointer;
 }
 
 session-list-item.selected {
-    background-color: #1e1e1e;
+    background-color: lighten(@primary-interaction-highlight-white, 30%);
 }
 
 .session-list-item-session-id::before {
     content: "Session: ";
 }
 
+.session-list-item-timestamp::before {
+    content: "Created: ";
+}
+
+.session-list-item-timestamp {
+    font-size: 12px;
+    opacity: 0.9;
+}
+
 .session-list-item-session-id {
     display: block;
     white-space: nowrap;
@@ -24,10 +36,22 @@ session-list-item.selected {
 
 .session-list-item-number-of-changes {
     font-size: 12px;
+    opacity: 0.6;
 }
 
 .session-list-item-number-of-changes::before {
     content: "Number of changes: ";
     position: relative;
     z-index: 0;
+}
+
+@media (prefers-color-scheme: dark) {
+    session-list-item {
+        border-color: @primary-bg-color-dark;
+        color: @primary-text-color-dark;
+    }
+
+    session-list-item.selected {
+        background-color: @primary-interaction-highlight-dark;
+    }
 }