fix: labeling GBI-2456

Author: Dominikkq

internal/adapters/entrypoints/rest/assets/static/management.js

@@ -258,7 +258,8 @@ function getConfirmationConfig(sectionId) {
             if (!tempArray[idx]) tempArray[idx] = {};
 
             if (input.value.trim() === '') {
-                showErrorToast(`Please enter a non-empty value for "${input.dataset.field === 'amount' ? 'rBTC amount' : 'confirmations'}."`);
+                const amountLabel = configKey === 'btcConfirmations' ? 'BTC amount' : 'rBTC amount';
+                showErrorToast(`Please enter a non-empty value for "${input.dataset.field === 'amount' ? amountLabel : 'confirmations'}."`);
                 throw new Error(`Empty ${input.dataset.field} input`);
             }