Restore filter functionality in UI.

assets/main.coffee

@@ -106,17 +106,8 @@ window.gotoAccuracy = ->
 
 window.changeTrackerID = ->
     console.log 'changeTrackerID'
-    
-    _trackerID = $('#trackerID_selector').val()
-    
-    if _trackerID != window.trackerID
-        Cookies.set 'trackerID', _trackerID
-        console.log 'changeTrackerID: trackerID cookie = %o', Cookies.get 'trackerID'
-        
-        window.trackerID = _trackerID
-        window.mymap.drawMap()
-    else
-        $('#configCollapse').collapse 'hide'
+    tid = $('#trackerID_selector').val()
+    window.mymap.setMarkerFilter tid
     return false
 
 window.initUI = ->
@@ -212,7 +203,7 @@ window.showBoundingBox = (lid) ->
 
 window.updateTrackerIDs = ->
     console.log 'updateTrackerIDs()'
-    $("#trackerID_selector option[value!='all']").each ->
+    $("#trackerID_selector option[value!='']").each ->
         $(this).remove()
     trackerIds = window.mymap.markermgr.getTrackerIds()
     console.log 'Got these tracker ids: %o', trackerIds

assets/markermgr.coffee

@@ -38,6 +38,7 @@ class window.MarkerMgr
         return result
 
     setFilter: (new_filter) ->
+        console.log 'MarkerMgr::setFilter(%o)', new_filter
         if new_filter?
             @filter_tids = new_filter
         else

assets/ownmap.coffee

@@ -4,6 +4,10 @@ class window.OwnMap
 
         @markermgr = markermgr
         @markermgr.startstop_only = Cookies.get('show_markers') is '0'
+        selected_tid = Cookies.get 'trackerID'
+        if selected_tid isnt ''
+            @markermgr.setFilter [selected_tid]
+
         @map_drawn = false
         @default_zoom = 15
         @default_centre = [0, 0]
@@ -87,6 +91,15 @@ class window.OwnMap
             @default_centre = @mymap.getCenter()
         , 2000
 
+    setMarkerFilter: (tid) ->
+        console.log 'OwnMap::setMarkerFilter(%o)', tid
+        Cookies.set 'trackerID', tid
+        if tid isnt ''
+            @markermgr.setFilter [tid]
+        else
+            @markermgr.setFilter()
+        @drawMap()
+
     showMarkers: ->
         console.log 'OwnMap::showMarkers()'
         @markermgr.startstop_only = false

templates/index.mustache

@@ -85,7 +85,7 @@
                 <span class="d-block d-sm-none"><span class="fas fa-user"></span></span>
               </div>
               <select class="form-control" name="tracker_id" id="trackerID_selector">
-                <option value="all">all</option>
+                <option value="">all</option>
               </select>
             </div>
           </div>