Added Import S/MIME certificate popup

And much better handling of the sign and encrypt options

dev/View/Popup/SMimeImport.js

@@ -0,0 +1,50 @@
+import { addObservablesTo } from 'External/ko';
+import { getNotification } from 'Common/Translator';
+
+import { AbstractViewPopup } from 'Knoin/AbstractViews';
+
+import Remote from 'Remote/User/Fetch';
+
+export class SMimeImportPopupView extends AbstractViewPopup {
+	constructor() {
+		super('SMimeImport');
+
+		addObservablesTo(this, {
+			pem: '',
+			pemError: false,
+			pemErrorMessage: '',
+			pemValid: false
+		});
+
+		this.pem.subscribe(value => {
+			this.pemError(false);
+			this.pemErrorMessage('');
+			this.pemValid(value && value.includes('-----BEGIN CERTIFICATE-----'));
+		});
+	}
+
+	submitForm() {
+		if (this.pemValid()) {
+			Remote.request('SMimeImportCertificate',
+				(iError, oData) => {
+					if (iError) {
+						this.pemError(true);
+						this.pemErrorMessage(getNotification(iError, oData?.ErrorMessage));
+//						oData?.ErrorMessageAdditional;
+					} else {
+						this.close();
+					}
+				},
+				{pem:this.pem()}
+			);
+		} else {
+			this.pemError(true);
+		}
+	}
+
+	onShow() {
+		this.pem('');
+		this.pemError(false);
+		this.pemErrorMessage('');
+	}
+}