Shift zoom fix Issue nautobot#41

nautobot_floor_plan/templates/nautobot_floor_plan/inc/floorplan_svg.html

@@ -2,7 +2,7 @@
 
 {% if floor_plan %}
     <h4>{{ floor_plan }} {% edit_button floor_plan %}</h4>
-    Use scroll wheel to zoom in or out. Click and drag to scroll.
+    Use shift+scroll wheel to zoom in or out. Click and drag to scroll.
     <div class="text-center text-small">
         <a href="{% url 'plugins-api:nautobot_floor_plan-api:floorplan-svg' pk=floor_plan.pk %}" class="rack_elevation_save_svg_link" download="floor_plan_{{ floor_plan.location.name }}.svg">
             <i class="mdi mdi-content-save-outline"></i> Save SVG
@@ -64,6 +64,7 @@ <h4>{{ floor_plan }} {% edit_button floor_plan %}</h4>
 
             // On scroll wheel in the SVG, zoom in or out
             svgImage.contentDocument.addEventListener("wheel", function(e){
+                if (!e.shiftKey) return
                 e.preventDefault();
                 var w = viewBox.w;
                 var h = viewBox.h;