Fix GL journal save, edit, detail view and list filters

Send journal lines, gl_id and list filters inside the ajax data payload where ajax_request reads them, select period when replacing a manual journal, and show ledger amounts to two decimals.

app/accounting/posting_window.php

@@ -157,8 +157,10 @@
       autoPrepare: true,
       checkRequired: 0,
       action: 'save',
-      open_from: from,
-      open_to:   to,
+      // Inside `data`: as top-level options these were ignored, and the save
+      // only worked because autoPrepare happens to sweep the two inputs, whose
+      // ids match the field names.
+      data: { open_from: from, open_to: to },
       onSuccess: function() {
         render_display(from, to);
       }
@@ -173,8 +175,7 @@
       autoPrepare: true,
       checkRequired: 0,
       action: 'save',
-      open_from: '',
-      open_to:   '',
+      data: { open_from: '', open_to: '' },
       onSuccess: function() {
         render_display('', '');
       }