fix default value in form if already set for rehab event TTPLAT-1239

app/views/asset_events/_rehabilitation_update_event_form.html.haml

@@ -17,7 +17,7 @@
   = f.input :total_cost, :wrapper => :vertical_prepend, label: 'Cost of Rebuild / Rehabilitation' do
     %span.input-group-addon
       %i.fa.fa-usd
-    = f.input_field :total_cost, :class => 'form-control', :required => true, :value => 0, :min => 0, :label => false
+    = f.input_field :total_cost, :class => 'form-control', :required => true, :value => (f.object.total_cost || 0), :min => 0, :label => false
     %span.input-group-addon
       %a.transam-popover{data: {placement: 'auto', toggle: 'popover', html: 'true', content: "This will increase the Cost (Adjusted) of the asset by the amount entered."}, title: 'Cost of Rebuild / Rehabilitation', tabindex: '0'}
         %i.fa.fa-info-circle