[BUG] Custom metadata columns are always formatted using toString() in the message browser.

[is-simon]

Describe the bug
When using other type than STRING for a custom Metadata, the dashboard should use a readable format instead of using the default "toString()", which sometime results in unreadable information.

Expected behavior

Actual behavior

Additional context
I've created the "expected" screenshot by adding those 2 lines of code just before this line:

if (modelIndex >= columnMap.size()) {
    columnFactory.configureCustomColumn(column, metaDataColumns.get(modelIndex - columnMap.size()).getType());
}

Note that the configureCustomColumn isn't called anywhere in the actual source code. The call of this function has been removed by this commit like 10 years ago. I'm surprise I didn't find anything about this in the opened issue.