Fix for SPE-1366(https://dev.prusa3d.com/browse/SPE-1366) - InGui Search doesn't work after switch to settings tab

src/slic3r/GUI/GLCanvas3D.cpp

@@ -5148,6 +5148,8 @@ bool GLCanvas3D::_init_main_toolbar()
     item.left.toggable = true;
     item.left.render_callback = [this](float left, float right, float, float) {
         if (m_canvas != nullptr) {
+            if (!m_canvas->HasFocus())
+                m_canvas->SetFocus();
             if (_render_search_list(0.5f * (left + right)))
                 _deactivate_search_toolbar_item();
         }