Direct payments for invoices

Events can be moved to archive and moved back
Fixed validation

public/css/invoices.css

@@ -4,7 +4,7 @@
     padding: 20px;
 }
 
-.invoice-main-flexbox div {
+.invoice-type-layer {
     flex: 1;
     padding: 10px;
     border: 1px solid #ccc;
@@ -15,7 +15,7 @@
     cursor: pointer;
 }
 
-.invoice-main-flexbox div:hover {
+.invoice-type-layer:hover {
     background-color: #FAE39C;
 }