SONAR-12122 Let users know that a restart is needed before they (un)install a plugin

server/sonar-web/src/main/js/apps/marketplace/components/PluginActions.tsx

 import * as React from 'react';
 import { Button } from 'sonar-ui-common/components/controls/buttons';
 import Checkbox from 'sonar-ui-common/components/controls/Checkbox';
+import Tooltip from 'sonar-ui-common/components/controls/Tooltip';
 import CheckIcon from 'sonar-ui-common/components/icons/CheckIcon';
 import { translate } from 'sonar-ui-common/helpers/l10n';
 import { installPlugin, uninstallPlugin, updatePlugin } from '../../../api/plugins';
         )}
         {loading && <i className="spinner spacer-right little-spacer-top little-spacer-bottom" />}
         {isInstalledPlugin(plugin) && (
-          <div className="display-inlin-block">
+          <>
             {plugin.updates &&
               plugin.updates.map((update, idx) => (
                 <PluginUpdateButton
                   update={update}
                 />
               ))}
-            <Button
-              className="js-uninstall button-red little-spacer-left"
-              disabled={loading}
-              onClick={this.handleUninstall}>
-              {translate('marketplace.uninstall')}
-            </Button>
-          </div>
+            <Tooltip overlay={translate('marketplace.requires_restart')}>
+              <Button
+                className="js-uninstall button-red little-spacer-left"
+                disabled={loading}
+                onClick={this.handleUninstall}>
+                {translate('marketplace.uninstall')}
+              </Button>
+            </Tooltip>
+          </>
         )}
         {isAvailablePlugin(plugin) && (
-          <Button
-            className="js-install"
-            disabled={loading || (plugin.termsAndConditionsUrl != null && !this.state.acceptTerms)}
-            onClick={this.handleInstall}>
-            {translate('marketplace.install')}
-          </Button>
+          <Tooltip overlay={translate('marketplace.requires_restart')}>
+            <Button
+              className="js-install"
+              disabled={
+                loading || (plugin.termsAndConditionsUrl != null && !this.state.acceptTerms)
+              }
+              onClick={this.handleInstall}>
+              {translate('marketplace.install')}
+            </Button>
+          </Tooltip>
         )}
       </div>
     );

server/sonar-web/src/main/js/apps/marketplace/components/PluginUpdateButton.tsx

  */
 import * as React from 'react';
 import { Button } from 'sonar-ui-common/components/controls/buttons';
-import { translateWithParameters } from 'sonar-ui-common/helpers/l10n';
+import Tooltip from 'sonar-ui-common/components/controls/Tooltip';
+import { translate, translateWithParameters } from 'sonar-ui-common/helpers/l10n';
 import { Update } from '../../../types/plugins';
 
 interface Props {
       return null;
     }
     return (
-      <Button
-        className="js-update little-spacer-bottom"
-        disabled={disabled}
-        onClick={this.handleClick}>
-        {translateWithParameters('marketplace.update_to_x', update.release.version)}
-      </Button>
+      <Tooltip overlay={translate('marketplace.requires_restart')}>
+        <Button
+          className="js-update little-spacer-bottom"
+          disabled={disabled}
+          onClick={this.handleClick}>
+          {translateWithParameters('marketplace.update_to_x', update.release.version)}
+        </Button>
+      </Tooltip>
     );
   }
 }

server/sonar-web/src/main/js/apps/marketplace/components/__tests__/__snapshots__/PluginActions-test.tsx.snap

       marketplace.terms_and_conditions
     </a>
   </p>
-  <Button
-    className="js-install"
-    disabled={true}
-    onClick={[Function]}
+  <Tooltip
+    overlay="marketplace.requires_restart"
   >
-    marketplace.install
-  </Button>
+    <Button
+      className="js-install"
+      disabled={true}
+      onClick={[Function]}
+    >
+      marketplace.install
+    </Button>
+  </Tooltip>
 </div>
 `;
 
 <div
   className="js-actions"
 >
-  <div
-    className="display-inlin-block"
-  >
-    <PluginUpdateButton
-      disabled={false}
-      key="0"
-      onClick={[Function]}
-      update={
-        Object {
-          "requires": Array [],
-          "status": "COMPATIBLE",
-        }
+  <PluginUpdateButton
+    disabled={false}
+    key="0"
+    onClick={[Function]}
+    update={
+      Object {
+        "requires": Array [],
+        "status": "COMPATIBLE",
       }
-    />
+    }
+  />
+  <Tooltip
+    overlay="marketplace.requires_restart"
+  >
     <Button
       className="js-uninstall button-red little-spacer-left"
       disabled={false}
     >
       marketplace.uninstall
     </Button>
-  </div>
+  </Tooltip>
 </div>
 `;
 

sonar-core/src/main/resources/org/sonar/l10n/core.properties

 marketplace.install_pending=Install Pending
 marketplace.update_pending=Update Pending
 marketplace.uninstall_pending=Uninstall Pending
+marketplace.requires_restart=This requires a restart
 marketplace.updates=Updates
 marketplace.update_status.COMPATIBLE=Compatible
 marketplace.update_status.INCOMPATIBLE=Incompatible