Added support for acknowledging code of conduct for using public Notebook Gallery (#117)

* minro code edits

* Added support for acknowledging code of conduct

- Added CodeOfConduct component that shows links and a checkbox that must be acknwledged before seeing the public galley
- Added verbose message for notebook publish error (when another notebook with the same name exists in the gallery)
- Added a feature flag for enabling code of conduct acknowledgement

* Added Info Component

* minor edit

* fixed failign tests

* publish tab displayed only when code of conduct accepted

* added code of conduct fetch during publish

* fixed bug

* added test and addressed PR comments

* changed line endings

* added comment

* addressed PR comments

src/Explorer/Controls/FeaturePanel/FeaturePanelComponent.tsx

@@ -49,6 +49,7 @@ export const FeaturePanelComponent: React.FunctionComponent = () => {
     { key: "feature.hosteddataexplorerenabled", label: "Hosted Data Explorer (deprecated?)", value: "true" },
     { key: "feature.enablettl", label: "Enable TTL", value: "true" },
     { key: "feature.enablegallerypublish", label: "Enable Notebook Gallery Publishing", value: "true" },
+    { key: "feature.enablecodeofconduct", label: "Enable Code Of Conduct Acknowledgement", value: "true" },
     {
       key: "feature.enableLinkInjection",
       label: "Enable Injecting Notebook Viewer Link into the first cell",

src/Explorer/Controls/FeaturePanel/__snapshots__/FeaturePanelComponent.test.tsx.snap

@@ -161,6 +161,12 @@ exports[`Feature panel renders all flags 1`] = `
           label="Enable Notebook Gallery Publishing"
           onChange={[Function]}
         />
+        <StyledCheckboxBase
+          checked={false}
+          key="feature.enablecodeofconduct"
+          label="Enable Code Of Conduct Acknowledgement"
+          onChange={[Function]}
+        />
         <StyledCheckboxBase
           checked={false}
           key="feature.enableLinkInjection"