Fix "hard" indent column info on status view. (#1078)

* Fix "hard" indent column info on status view.

* Update tabs calculation and add "byte" number info

* Add config.show_char_byte_info

* Add show char byte toggle command.

it should be added on the commands/statusbar.lua, but there is no config module loaded before and i won't to add it.

* Update config.lua

* Update statusview.lua

data/core/statusview.lua

@@ -222,6 +222,20 @@ function StatusView:register_docview_items()
     get_item = function()
       local dv = core.active_view
       local line, col = dv.doc:get_selection()
+      local _, indent_size = dv.doc:get_indent_info()
+      -- Calculating tabs when the doc is using the "hard" indent type.
+      local ntabs = 0
+      local last_idx = 0
+      while last_idx < col do
+        local s, e = string.find(dv.doc.lines[line], "\t", last_idx, true)
+        if s and s < col then
+          ntabs = ntabs + 1
+          last_idx = e + 1
+        else
+          break
+        end
+      end
+      col = col + ntabs * (indent_size - 1)
       return {
         style.text, line, ":",
         col > config.line_limit and style.accent or style.text, col,
@@ -1159,5 +1173,4 @@ function StatusView:draw()
   end
 end
 
-
 return StatusView