Rewritten part of config to Haml, created helper for views.
Rewritten another configuration parts to Haml, edited helper.
Splitted module definition
Corrected typo, Fixed rendering method calling
Removed VDI (#676), review response - edited variables loading
Spec for configuration helper
Use placeholder to display default/new value in grey/black in the form.

Removed JS code that used to show default value of class fields in grey on value Instance edit form and used to change it to black text when user changed the value. Replaced that functionality by using :placeholder attribute of text_field_tag. Deleted any related CSS and JS methods.
Edited test for helper
Removed graphical/textual images and icons rendering methods (#817)
Merge pull request #1100 from h-kataria/automate_instance_display_default_value_in_form_changes

Use placeholder to display default/new value in grey/black in the form.
Merge pull request #815 from romanblanco/erb2haml3

Created configuration helper