Responsive improvements

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/views/dashboard/show.html.haml

@@ -2,7 +2,7 @@
   .dashboard.row
     .activities.col-md-8
       = render 'activities'
-    .side.col-md-4.hidden-xs.hidden-sm
+    .side.col-md-4
       = render 'sidebar'
 
 - else

app/views/layouts/_head_panel.html.haml

@@ -8,14 +8,13 @@
         %span.separator
       %h1.project_name= title
 
-      .hidden-xs.hidden-sm
       %ul.nav.navbar-nav
         %li
           %a
             %div.gl-hide.turbolink-spinner
               %i.icon-refresh.icon-spin
               Loading...
-          %li
+        %li.hidden-sm
           = render "layouts/search"
         %li
           = link_to public_root_path, title: "Public area", class: 'has_bottom_tooltip', 'data-original-title' => 'Public area' do

app/views/projects/issues/_head.html.haml

@@ -18,7 +18,7 @@
     %li.pull-right
       .pull-right
         = form_tag project_issues_path(@project), method: :get, id: "issue_search_form", class: 'inline issue-search-form'  do
-          .append-right-10
+          .append-right-10.hidden-xs.hidden-sm
             = search_field_tag :issue_search, nil, { placeholder: 'Filter by title or description', class: 'form-control issue_search search-text-input' }
         - if can? current_user, :write_issue, @project
           = link_to new_project_issue_path(@project, issue: { assignee_id: params[:assignee_id], milestone_id: params[:milestone_id]}), class: "btn btn-new", title: "New Issue", id: "new_issue_link" do

app/views/shared/_filter.html.haml

@@ -1,4 +1,4 @@
-.side-filters
+.side-filters.hidden-xs.hidden-sm
   = form_tag filter_path(entity), method: 'get' do
     %fieldset.scope-filter
       %ul.nav.nav-pills.nav-stacked
@@ -24,7 +24,7 @@
           = link_to filter_path(entity, status: 'all') do
             All
 
-    %fieldset.hidden-xs.hidden-sm
+    %fieldset
       %legend Projects
       %ul.nav.nav-pills.nav-pills-small.nav-stacked
         - @projects.each do |project|

app/views/shared/_project_filter.html.haml

@@ -1,3 +1,4 @@
+.side-filters.hidden-xs.hidden-sm
   = form_tag project_entities_path, method: 'get' do
     %fieldset
       - if current_user