fix: hide sign action while positioning signer

Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>

Author: vitormattos

src/components/Request/VisibleElements.vue

@@ -60,7 +60,7 @@
 						{{ t('libresign', 'Save') }}
 					</NcButton>
 
-					<NcButton v-if="canSign"
+					<NcButton v-if="canSign && !signerSelected"
 						:variant="variantOfSignButton"
 						:wide="true"
 						@click="goToSign">