presets: clear out applied status when switching profiles (#591)

## Link to GitHub Issue or related Pull Request, if one exists
#581 

## Description of change
Ensure "applied" status is not persisted through.

src/spice2x/overlay/windows/config.cpp

@@ -5367,6 +5367,7 @@ namespace overlay::windows {
                 templates_selected = -1;
                 all_cleared = false;
                 template_target_selection.clear();
+                std::fill(this->template_is_applied.begin(), this->template_is_applied.end(), false);
                 ImGui::CloseCurrentPopup();
             }