Add graphic to feature flag empty state

app/views/projects/feature_flags/_empty_state.html.haml

 .border-top
   .row.empty-state
+    .col-12
+      .svg-content
+        = image_tag 'illustrations/feature_flag.svg'
+
     .col-12
       .text-content
         %h4.text-center= s_('FeatureFlags|Get started with feature flags')
-      %p.text-center
+        %p
           = s_('FeatureFlags|Feature flags allow you to configure your code into different flavors by dynamically toggling certain functionality.')
           = link_to 'More information', '#'
 
-      .text-center.append-bottom-8
+        .text-center
           = render 'new_feature_flag_button'
 
         .text-center

yarn.lock

@@ -180,17 +180,16 @@
     lodash "^4.17.10"
     to-fast-properties "^2.0.0"
 
-"@gitlab-org/gitlab-svgs@^1.23.0", "@gitlab-org/gitlab-svgs@^1.29.0":
-  version "1.29.0"
-  resolved "https://registry.yarnpkg.com/@gitlab-org/gitlab-svgs/-/gitlab-svgs-1.29.0.tgz#03b65b513f9099bbda6ecf94d673a2952f8c6c70"
-  integrity sha512-sCl6nP3ph36+8P3nrw9VanAR648rgOUEBlEoLPHkhKm79xB1dUkXGBtI0uaSJVgbJx40M1/Ts8HSdMv+PF3EIg==
+"@gitlab-org/gitlab-svgs@^1.29.0":
+  version "1.30.0"
+  resolved "https://registry.yarnpkg.com/@gitlab-org/gitlab-svgs/-/gitlab-svgs-1.30.0.tgz#72dca2fb67bafb3c975a322dc6406aaa29aed86c"
 
 "@gitlab-org/gitlab-ui@^1.7.1":
   version "1.7.1"
   resolved "https://registry.yarnpkg.com/@gitlab-org/gitlab-ui/-/gitlab-ui-1.7.1.tgz#e9cce86cb7e34311405e705c1de674276b453f17"
   integrity sha512-X12W39lFnWmfmYcHBokrauKvp6VLW9u0rFdgBXWlnrRL2hBShnyeBsBXKLMGUGnofMtgYv3iYO/rFW9IB79lFg==
   dependencies:
-    "@gitlab-org/gitlab-svgs" "^1.23.0"
+    "@gitlab-org/gitlab-svgs" "^1.30.0"
     bootstrap-vue "^2.0.0-rc.11"
     vue "^2.5.16"