Move buttons to separate component (#380)

Co-authored-by: kolaente <k@knt.li>
Reviewed-on: https://kolaente.dev/vikunja/frontend/pulls/380
Co-authored-by: konrad <konrad@kola-entertainments.de>
Co-committed-by: konrad <konrad@kola-entertainments.de>

src/components/misc/shortcut.vue

@@ -0,0 +1,20 @@
+<template>
+	<span class="shortcuts">
+		<template v-for="(k, i) in keys">
+			<span :key="i">{{ k }}</span>
+			<i v-if="i < keys.length - 1" :key="`plus${i}`">+</i>
+		</template>
+	</span>
+</template>
+
+<script>
+export default {
+	name: 'shortcut',
+	props: {
+		keys: {
+			type: Array,
+			required: true,
+		}
+	},
+}
+</script>