Make the local bookmarks print their error message if they fail; also replace whitespaces with underscores for identifiers

data/assets/global/localbookmarks.asset

@@ -5,7 +5,10 @@ local nodes = bookmarkHelper.getBookmarks("Local Bookmarks", "${ASSETS}/customiz
 
 asset.onInitialize(function()
   for _, n in ipairs(nodes) do
-    pcall(openspace.addSceneGraphNode, n)
+    local success, error = pcall(openspace.addSceneGraphNode, n)
+    if not success then
+      openspace.printError(error)
+    end
   end
 end)
 

data/assets/util/generate_bookmarks.asset

@@ -7,6 +7,8 @@ local getBookmarks = function (guiPath, bookmarkfile)
       local matchstring = "(.-),(.-),(.-),(.-),(.-),(.-),(.-),(.-),(.-),(.-),(.-)$"
       local group, name, globe, lat, lon, altitude, x, y, z, scale, linewidth = line:match(matchstring)
 
+      local identifier = string.gsub(guiPath .. "-" .. name, " ", "_")
+
       scale = (scale == "" and 75000 or scale)
       linewidth = (linewidth == "" and 2.0 or tonumber(linewidth))
       group = (group == "" and globe or group)
@@ -14,7 +16,7 @@ local getBookmarks = function (guiPath, bookmarkfile)
       local parent = (globe == "" and "Root" or globe)
 
       local sgn = {
-        Identifier = guiPath .. "-" .. name,
+        Identifier = identifier,
         Parent = parent,
         Transform = {
           Scale = {