fix: only show preserve order toggle with multiple signers

Hide preserve signing order toggle when there's only one signer,
as signing order is not applicable in this case.

Signed-off-by: Vitor Mattos <[email protected]>

Author: vitormattos

src/Components/RightSidebar/RequestSignatureTab.vue

@@ -379,7 +379,7 @@ export default {
 			return this.hasSigners && this.filesStore.canSave() && !this.isAdminFlowForced
 		},
 		showPreserveOrder() {
-			return this.hasSigners && this.filesStore.canSave() && !this.isAdminFlowForced
+			return this.totalSigners > 1 && this.filesStore.canSave() && !this.isAdminFlowForced
 		},
 		showViewOrderButton() {
 			return this.isOrderedNumeric && this.totalSigners > 1 && this.hasSigners