Split out reload functionality to actual document, and added in a thread to check the document, in the cases where it wouldn't be covered by dirwatch.

data/core/commands/doc.lua

@@ -466,6 +466,10 @@ local commands = {
       command.perform("doc:save-as")
     end
   end,
+  
+  ["doc:reload"] = function()
+    doc():reload()
+  end,
 
   ["file:rename"] = function()
     local old_filename = doc().filename

data/core/doc/init.lua

@@ -80,6 +80,16 @@ function Doc:load(filename)
 end
 
 
+function Doc:reload()
+  if self.filename then
+    local sel = { self:get_selection() }
+    self:load(self.filename)
+    self:clean()
+    self:set_selection(table.unpack(sel))
+  end
+end
+
+
 function Doc:save(filename, abs_filename)
   if not filename then
     assert(self.filename, "no filename set to default to")