web/save: add paste button & dummy mode buttons

tuned default button look, moved custom icons to lib for easy access

web/src/components/buttons/ActionButton.svelte

@@ -0,0 +1,10 @@
+<script lang="ts">
+    export let id: string;
+    export let text: string = "Button";
+    export let click = () => { alert('no function assigned') };
+</script>
+
+<button id={id} on:click={click}>
+    <slot></slot>
+    {text}
+</button>