fix(pi): load more button needs to be clicked twice

If the number of available envelopes is lower than the initial page size,
the list will still be expanded without any effect. Only the second click
will trigger loading more envelopes.

Signed-off-by: Richard Steinmetz <[email protected]>

src/components/Mailbox.vue

@@ -235,7 +235,7 @@ export default {
 			}
 		},
 		async loadMore() {
-			if (!this.expanded) {
+			if (!this.expanded && this.envelopesToShow.length < this.envelopes.length) {
 				logger.debug('expanding envelope list')
 				this.expanded = true
 				return