Polishing Kubernetes section view in Preferences (#3603)

* Using RemovableItem for items in Kubernetes page

Signed-off-by: Alex Andreev <alex.andreev.email@gmail.com>

* Helm Charts empty state

Signed-off-by: Alex Andreev <alex.andreev.email@gmail.com>

* Empty state for kubeconfig sync list

Signed-off-by: Alex Andreev <alex.andreev.email@gmail.com>

* Remove unused styles

Signed-off-by: Alex Andreev <alex.andreev.email@gmail.com>

* Fixing tests

Signed-off-by: Alex Andreev <alex.andreev.email@gmail.com>

src/renderer/components/+preferences/removable-item.tsx

@@ -0,0 +1,48 @@
+/**
+ * Copyright (c) 2021 OpenLens Authors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+import styles from "./removable-item.module.css";
+
+import React, { DOMAttributes } from "react";
+
+import { cssNames } from "../../utils";
+import { Icon } from "../icon";
+
+interface Props extends DOMAttributes<any>{
+  icon?: string;
+  onRemove: () => void;
+  className?: string;
+}
+
+export function RemovableItem({icon, onRemove, children, className, ...rest}: Props) {
+  return (
+    <div className={cssNames(styles.item, "flex gaps align-center justify-space-between", className)} {...rest}>
+      {icon && (
+        <Icon material={icon}/>
+      )}
+      {children}
+      <Icon
+        material="delete"
+        onClick={onRemove}
+        tooltip="Remove"
+      />
+    </div>
+  );
+}