Use type-appropriate renderer for custom metadata columns in message browser

This fixes what was apparently a regression bug in Mirth 3.2.0
introduced by commit 70eba57. It
restores the functionality to display the contents of custom metadata
columns in a format appropriate to the column type rather than always
using the default MessageBrowserTextCellRenderer for non-String types.

Signed-off-by: Tony Germano <tony@germano.name>
Commit-message-by: Tony Germano <tony@germano.name>
Issue: #75
Related: nextgenhealthcare/connect#6203

Author: sbraconnier

client/src/com/mirth/connect/client/ui/browsers/message/MessageBrowser.java

@@ -382,6 +382,9 @@ public void loadChannel(MessageBrowserChannelModel channelModel) {
         MessageBrowserTableColumnFactory columnFactory = (MessageBrowserTableColumnFactory) messageTreeTable.getColumnFactory();
         for (int modelIndex = 0; modelIndex < columnList.size(); modelIndex++) {
             TableColumnExt column = columnFactory.createAndConfigureTableColumn(messageTreeTable.getModel(), modelIndex);
+            if (modelIndex >= columnMap.size()) {
+                columnFactory.configureCustomColumn(column, metaDataColumns.get(modelIndex - columnMap.size()).getType());
+            }
             messageTreeTable.addColumn(column);
         }