Fixed up the <title>/<h2> mess in trace/edit and trace/view

* @title was never set on trace editing, and thus <h2></h2> was produced
 * Changed split 'trace.view.viewing_trace' into 'trace.view.title' and 'trace.view.heading'
 * Introduced corresponding 'trace.edit.title' and 'trace.edit.heading'

app/controllers/trace_controller.rb

@@ -111,7 +111,7 @@ class TraceController < ApplicationController
 
     if @trace and @trace.visible? and
        (@trace.public? or @trace.user == @user)
-      @title = t 'trace.view.viewing_trace', :name => @trace.name
+      @title = t 'trace.view.title', :name => @trace.name
     else
       flash[:notice] = t 'trace.view.trace_not_found'
       redirect_to :controller => 'trace', :action => 'list'
@@ -168,6 +168,7 @@ class TraceController < ApplicationController
     @trace = Trace.find(params[:id])
 
     if @user and @trace.user == @user
+      @title = t 'trace.edit.title', :name => @trace.name
       if params[:trace]
         @trace.description = params[:trace][:description]
         @trace.tagstring = params[:trace][:tagstring]

app/views/trace/edit.html.erb

@@ -1,4 +1,4 @@
-<h2><%= h(@title) %></h2>
+<h2><%= t 'trace.edit.heading', :name => @trace.name %></h2>
 
 <img src="<%= url_for :controller => 'trace', :action => 'picture', :id => @trace.id, :display_name => @trace.user.display_name %>">
 

app/views/trace/view.html.erb

@@ -1,4 +1,4 @@
-<h2><%= h(@title) %></h2>
+<h2><%= t 'trace.view.heading', :name => @trace.name %></h2>
 
   <% if @trace.inserted %>
     <img src="<%= url_for :controller => 'trace', :action => 'picture', :id => @trace.id, :display_name => @trace.user.display_name %>">