Workflows manager: add user-friendly CR selector

This CL lets users select CRs for the "Reply with CR" action in a
user-friendly manner.

A "Select CR" button next to the CR field has been added, which opens a
popup with an adapted version of the Community Console CR list with
buttons next to each CR which lets the user select one of them.

Fixed: twpowertools:148
Change-Id: I9799d671e7440b66435b30c540adc3f050c9f4e2
diff --git a/src/contentScripts/communityConsole/workflows/components/TwptCRImportButton.js b/src/contentScripts/communityConsole/workflows/components/TwptCRImportButton.js
new file mode 100644
index 0000000..935926f
--- /dev/null
+++ b/src/contentScripts/communityConsole/workflows/components/TwptCRImportButton.js
@@ -0,0 +1,40 @@
+import '@material/web/button/outlined-button.js';
+
+import {html, LitElement} from 'lit';
+
+import {SHARED_MD3_STYLES} from '../../../../common/styles/md3.js';
+
+export default class TwptCRImportButton extends LitElement {
+  static properties = {
+    cannedResponseId: {type: String},
+    selected: {type: Boolean},
+  };
+
+  static styles = [
+    SHARED_MD3_STYLES,
+  ];
+
+  render() {
+    const icon = this.selected ? 'done' : 'post_add';
+    const label = this.selected ? 'Selected' : 'Select';
+
+    return html`
+      <md-outlined-button
+          icon=${icon}
+          label=${label}
+          ?disabled=${this.selected}
+          @click=${this._importCR}>
+      </md-outlined-button>
+    `;
+  }
+
+  _importCR() {
+    window.opener?.postMessage?.(
+        {
+          action: 'importCannedResponse',
+          cannedResponseId: this.cannedResponseId,
+        },
+        '*');
+  }
+}
+window.customElements.define('twpt-cr-import-button', TwptCRImportButton);