replace button with vue button component

apps/dav/src/views/Availability.vue

@@ -25,11 +25,11 @@
 			:l10n-friday="$t('dav', 'Friday')"
 			:l10n-saturday="$t('dav', 'Saturday')"
 			:l10n-sunday="$t('dav', 'Sunday')" />
-		<button :disabled="loading || saving"
-			class="button primary"
+		<Button :disabled="loading || saving"
+			type="primary"
 			@click="save">
 			{{ $t('dav', 'Save') }}
-		</button>
+		</Button>
 	</div>
 </template>
 
@@ -42,11 +42,14 @@ import {
 } from '../service/CalendarService'
 import jstz from 'jstimezonedetect'
 import TimezonePicker from '@nextcloud/vue/dist/Components/TimezonePicker'
+import Button from '@nextcloud/vue/dist/Components/Button'
+
 export default {
 	name: 'Availability',
 	components: {
 		CalendarAvailability,
 		TimezonePicker,
+		Button,
 	},
 	data() {
 		// Try to determine the current timezone, and fall back to UTC otherwise

apps/files/src/components/TransferOwnershipDialogue.vue

@@ -25,12 +25,12 @@
 		<form @submit.prevent="submit">
 			<p class="transfer-select-row">
 				<span>{{ readableDirectory }}</span>
-				<button v-if="directory === undefined" @click.prevent="start">
+				<Button v-if="directory === undefined" @click.prevent="start">
 					{{ t('files', 'Choose file or folder to transfer') }}
-				</button>
-				<button v-else @click.prevent="start">
+				</Button>
+				<Button v-else @click.prevent="start">
 					{{ t('files', 'Change') }}
-				</button>
+				</Button>
 				<span class="error">{{ directoryPickerError }}</span>
 			</p>
 			<p class="new-owner-row">
@@ -72,6 +72,7 @@ import { generateOcsUrl } from '@nextcloud/router'
 import { getFilePickerBuilder, showSuccess } from '@nextcloud/dialogs'
 import Multiselect from '@nextcloud/vue/dist/Components/Multiselect'
 import Vue from 'vue'
+import Button from '@nextcloud/vue/dist/Components/Button'
 
 import logger from '../logger'
 
@@ -86,6 +87,7 @@ export default {
 	name: 'TransferOwnershipDialogue',
 	components: {
 		Multiselect,
+		Button,
 	},
 	data() {
 		return {