Settings split according to chart

routes/api.js
   - check type of sensor
   - translate error message

app.js
   - debug = false at i18n

public/javascripts/chart_utilities.js
   - setter/getter for current Tab

public/javascripts/global.js
   - settings dialog completely rearranged
   - if only sensorid is given, check type

routes/index.js
   - set language to global variable

views/index.pug
   - reaggange settings dialog
   - translate 'Error'

views/layout.pug
   - load new datepicker (vanillajs-datepicker)

public/javascripts/map.js
   - fetching from server refactored to function
   - reenable tabs after leaving map

charts/preparecharts
   - typo

public/javascripts/showcharts.js
   - loadAll extended to  load also live and map

public/stylesheets/style.sass
   - a few changes for settinds dialog

locales/[de|en]
   - added a few words

charts/utilities.js
   - setter and getter for language

public/stylesheets/style.sass

@@ -192,7 +192,7 @@ footer
   width: 40%
 
 #nbrofdays, #peaklim, #olderthan
-  width: 10%
+  width: 13%
 
 .addit
   width: 20%
@@ -226,9 +226,12 @@ footer
   color: $navtab-color
   background-color: #FFFFFF
 
-#sellan
+// for settings: set all to 'none'
+#stday, #nbday, #pklim, #odth
   display: none
 
+
+
 // for first page to show 'Loading ...'
 #first
   display: flex