Creates a new DataEntry widget, taking into account the requested entry name if
plugin_name is not null (if no entry of that name is found, then the default data entry
widget will be created).
The plugin_name format is interpreted as two parts: <plugin name>:<plugin options>, and if the
plugins has no option, then the ":<plugin options>" part may be omitted.
| type |
a Type |
| plugin_name |
the name of an entry plugin, or null |
|
a new DataEntry widget, _NEVER_ null |