Improve New Project page for mobile.

Separate the New Project page's "Project path" grouped fields into separate fields.

Fixes #18599.

app/assets/stylesheets/pages/projects.scss

@@ -5,10 +5,12 @@
     font-weight: normal;
   }
 }
+
 .no-ssh-key-message, .project-limit-message {
   background-color: #f28d35;
   margin-bottom: 0;
 }
+
 .new_project,
 .edit-project {
   fieldset.features {
@@ -18,13 +20,6 @@
   }
 }
 
-.project-name-holder {
-  .help-inline {
-    vertical-align: top;
-    padding: 7px;
-  }
-}
-
 .project-home-panel {
   background: $white-light;
   text-align: left;
@@ -376,6 +371,7 @@ a.deploy-project-label {
 
 .project-import .btn {
   float: left;
+  margin-bottom: 10px;
   margin-right: 10px;
 }
 

app/views/projects/new.html.haml

@@ -11,21 +11,17 @@
   .project-edit-content
 
     = form_for @project, html: { class: 'new_project form-horizontal js-requires-input' } do |f|
-      .form-group.project-name-holder
+      .form-group
+        = f.label :path, class: 'control-label' do
+          Project owner
+        .col-sm-10
+          = f.select :namespace_id, namespaces_options(:current_user), {}, {class: 'select2 js-select-namespace', tabindex: 1}
+        
+      .form-group
         = f.label :path, class: 'control-label' do
-          Project path
+          Project name
         .col-sm-10
-          .input-group
-            - if current_user.can_select_namespace?
-              .input-group-addon
-                = root_url
-              = f.select :namespace_id, namespaces_options(params[:namespace_id] || :current_user, display_path: true), {}, {class: 'select2 js-select-namespace', tabindex: 1}
-              .input-group-addon
-                \/
-            - else
-              .input-group-addon
-                #{root_url}#{current_user.username}/
-            = f.text_field :path, placeholder: "my-awesome-project", class: "form-control", tabindex: 2, autofocus: true, required: true
+          = f.text_field :path, placeholder: "my-awesome-project", class: "form-control", tabindex: 2, autofocus: true, required: true
 
           - if current_user.can_create_group?
             .help-block