[fix] Wallet TX: do not allow to change wallet, if only one defined

www/templates/wallet/view_wallet_tx.html

@@ -29,6 +29,13 @@
                  style="font-style: italic;">
             (<span ng-bind-html=":balance:rebind:formData.balance | formatAmount:{useRelative:!$root.settings.useRelative, currency: $root.currency.name}"></span>)
           </ng-if>
+          <ng-if ng-if=":rebind:!enableSelectWallet"
+             style="color: lightgray;">
+            <span ng-if=":rebind:formData.name">{{:rebind:formData.name}}</span>
+            <span ng-if=":rebind:!formData.name && formData.uid">{{:rebind:formData.uid}}</span>
+            <span ng-if=":rebind:!formData.name && !formData.uid"><b class="ion-key"></b> {{:rebind:formData.pubkey | formatPubkey}}</span>
+          </ng-if>
+
           <!-- select wallet button -->
           <ng-if ng-if=":rebind:enableSelectWallet">
             <a class="hidden-xs hidden-sm"