feat(lite): add "coming soon" message on empty views (#6389)

@xen-orchestra/lite/src/views/host/HostDashboardView.vue

@@ -1,4 +1,4 @@
 <template>
-  Host dashboard
+  Host dashboard (coming soon)
   <RouterView />
 </template>

@xen-orchestra/lite/src/views/pool/PoolAlarmsView.vue

@@ -1 +1 @@
-<template>Alarms</template>
+<template>Alarms (coming soon)</template>

@xen-orchestra/lite/src/views/pool/PoolHostsView.vue

@@ -1 +1 @@
-<template>Hosts</template>
+<template>Hosts (coming soon)</template>

@xen-orchestra/lite/src/views/pool/PoolNetworkView.vue

@@ -1 +1 @@
-<template>Network</template>
+<template>Network (coming soon)</template>

@xen-orchestra/lite/src/views/pool/PoolStatsView.vue

@@ -1 +1 @@
-<template>Stats</template>
+<template>Stats (coming soon)</template>

@xen-orchestra/lite/src/views/pool/PoolStorageView.vue

@@ -1 +1 @@
-<template>Storage</template>
+<template>Storage (coming soon)</template>

@xen-orchestra/lite/src/views/pool/PoolSystemView.vue

@@ -1 +1 @@
-<template>System</template>
+<template>System (coming soon)</template>

@xen-orchestra/lite/src/views/pool/PoolTasksView.vue

@@ -1 +1 @@
-<template>Tasks</template>
+<template>Tasks (coming soon)</template>