Settings added

public/chart_utilities.js
   - showError with id

public/javascripts/global.js
   - save parameter fron settings

views/index.pug
    - add settings dialog

views/layout.pug
   - add flatpicker

public/javascripts/map.js
   - add error evaluation

public/javascripts/showcharts.js
   - error avelauation added

public/stylesheets/style.sass
   - add styles for settings dialog

public/javascripts/map.js

@@ -59,15 +59,14 @@ export async function showMap(params, status) {
             params.sid = clickedSensor
             let triggerEl = document.querySelector('#livetab')
             bootstrap.Tab.getInstance(triggerEl).show() // Select tab by name
-            await showChart(params, 'live', 'dlive')
-            loadAll(params)
-            status.loaded = true
+            let ok = await showChart(params, 'live', 'dlive')
+            if (ok) {
+                loadAll(params)
+                status.loaded = true
+            }
             map.setView([clickedcoords.lat, clickedcoords.lng]);
-
-
         })
     })
-
 }