[FIX] web: restrict to open sidebar forcefully in pdf viewer initially

Before this commit, when PDF viewer opens, it opens the sidebar forcefully.

Now with this commit, we have restricted to open the sidebar on initial load
by passing the false value to the forceOpen flag, we did this changes directly
in the library file itself as the file loads in iframe so we can not change the
file from outside by overriding the existing function or parameter.

task-2209742

closes odoo/odoo#47458

Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>

addons/web/static/lib/pdfjs/web/viewer.js

@@ -5077,7 +5077,10 @@ function () {
         return;
       }
 
-      if (!this._switchView(view, true)) {
+      // Odoo: This change is needed here as we can't change this parameter in an iframe.
+      // pass forceOpen argument to false to restrict opening of sidebar forcefully when
+      // pdf viewer opens initially.
+      if (!this._switchView(view, false)) {
         this._dispatchEvent();
       }
     }