Remove project dropdown and fix db sche,a

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

app/views/layouts/_head_panel.html.haml

@@ -12,11 +12,6 @@
 
     .navbar-collapse.collapse
       %ul.nav.navbar-nav
-
-        - if @project && @repository
-          %li
-            .project-home-dropdown
-              = render "projects/dropdown"
         %li.hidden-sm.hidden-xs
           = render 'layouts/search'
         %li.visible-sm.visible-xs

db/schema.rb

@@ -350,10 +350,10 @@
     t.string   "import_url"
     t.integer  "visibility_level",       default: 0,        null: false
     t.boolean  "archived",               default: false,    null: false
+    t.string   "avatar"
     t.string   "import_status"
     t.float    "repository_size",        default: 0.0
     t.integer  "star_count",             default: 0,        null: false
-    t.string   "avatar"
     t.string   "import_type"
     t.string   "import_source"
   end
@@ -476,6 +476,7 @@
     t.integer  "notification_level",            default: 1,     null: false
     t.datetime "password_expires_at"
     t.integer  "created_by_id"
+    t.datetime "last_credential_check_at"
     t.string   "avatar"
     t.string   "confirmation_token"
     t.datetime "confirmed_at"
@@ -483,7 +484,6 @@
     t.string   "unconfirmed_email"
     t.boolean  "hide_no_ssh_key",               default: false
     t.string   "website_url",                   default: "",    null: false
-    t.datetime "last_credential_check_at"
     t.string   "github_access_token"
     t.string   "gitlab_access_token"
     t.string   "notification_email"
@@ -505,30 +505,6 @@
   add_index "users", ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true, using: :btree
   add_index "users", ["username"], name: "index_users_on_username", using: :btree
 
-  create_table "users_groups", force: true do |t|
-    t.integer  "group_access",                   null: false
-    t.integer  "group_id",                       null: false
-    t.integer  "user_id",                        null: false
-    t.datetime "created_at"
-    t.datetime "updated_at"
-    t.integer  "notification_level", default: 3, null: false
-  end
-
-  add_index "users_groups", ["user_id"], name: "index_users_groups_on_user_id", using: :btree
-
-  create_table "users_projects", force: true do |t|
-    t.integer  "user_id",                        null: false
-    t.integer  "project_id",                     null: false
-    t.datetime "created_at"
-    t.datetime "updated_at"
-    t.integer  "project_access",     default: 0, null: false
-    t.integer  "notification_level", default: 3, null: false
-  end
-
-  add_index "users_projects", ["project_access"], name: "index_users_projects_on_project_access", using: :btree
-  add_index "users_projects", ["project_id"], name: "index_users_projects_on_project_id", using: :btree
-  add_index "users_projects", ["user_id"], name: "index_users_projects_on_user_id", using: :btree
-
   create_table "users_star_projects", force: true do |t|
     t.integer  "project_id", null: false
     t.integer  "user_id",    null: false