fix(NcModal): ignore arrow navigation active element is outside

Signed-off-by: Grigorii K. Shartsev <me@shgk.me>

src/components/NcModal/NcModal.vue

@@ -618,6 +618,15 @@ export default {
 
 		// Key Handlers
 		handleKeydown(e) {
+			// Ignore arrow navigation, if there is a current focus outside the modal.
+			// For example, when the focus is in Sidebar or NcActions's items,
+			// arrow navigation should not be intercept by modal slider
+			if (document.activeElement) {
+				if (!this.$el.contains(document.activeElement)) {
+					return
+				}
+			}
+
 			switch (e.keyCode) {
 			case 37: // left arrow
 				this.previous(e)