[Browser] Renaming only accepts characters and behaviour issue with unaccepted character in name

[roya0045]

Describe the bug
When renaming a geopackage layer, using the rename function only allows the user to provide characters, not symbols (other than _ ) or numbers.

If the name of the layer already contain number or special characters those cannot be interacted with other than by deleting part of the text containing them in one action.

How to Reproduce

In the browser with a geopackage containing layers.
1 Right click any layer
2. Rename Layer ...
3. Try to input numbers

QGIS and OS versions

Win 10, QGIS 3.14.16

Additional context

Untested for any other providers, assuming same constrains apply.

[roya0045]

Assuming issue with the regex or regex validation

QGIS/src/gui/providers/ogr/qgsgeopackageitemguiprovider.cpp

Line 274 in 3af038f

const QRegExp checkRe( QStringLiteral( R"re([A-Za-z_][A-Za-z0-9_\s]+)re" ) );

[roya0045]

I'm not sure if there are constraints with geopackage but could we replace the regex with ([A-Za-z_0-9\-][A-Za-z0-9_\s\-]+)??