Long instance names + group names covers namespace dropdown

When the project path is long the namespace drop-down is not visible and is not clickable. The bug was found by a gitlab-qa run on an instance with a long name exact error:

Selenium::WebDriver::Error::UnknownError:
  unknown error: Element <div class="select2-container select2 js-select-namespace" id="s2id_project_namespace_id" style="width: 342px;">...</div> is not clickable at point (903, 215). Other element would receive the click: <input placeholder="my-awesome-project" class="form-control" tabindex="2" autofocus="autofocus" required="required" type="text" name="project[path]" id="project_path">
  (Session info: headless chrome=63.0.3239.84)
   (Driver info: chromedriver=2.34.522913 (36222509aa6e819815938cbf2709b4849735537c),platform=Linux 4.13.9-coreos x86_64)

Job run link: https://gitlab.com/charts/helm.gitlab.io/-/jobs/47959986

Screenshot attached: