fix position of sticky table header when titlebar present

src/renderer/styles/ag-grid.scss

@@ -10,6 +10,10 @@
     transition: position 0.2s ease-in-out;
 }
 
+.ag-header-window-bar {
+    top: 95px;
+}
+
 .ag-header {
     z-index: 5;
 }