[PostGIS] #4666: Port shp2pgsql-gui to GTK 4 (was: Port shp2pgsql-gui to GTK 3)

[PostGIS]

#4666: Port shp2pgsql-gui to GTK 4
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  Reporter:  Bas Couwenberg       |      Owner:  robe
      Type:  enhancement          |     Status:  new
  Priority:  medium               |  Milestone:  PostGIS Fund Me
 Component:  utils/loader-dumper  |    Version:  3.0.x
Resolution:                       |   Keywords:
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Changes (by komzpa):

 * summary:  Port shp2pgsql-gui to GTK 3 => Port shp2pgsql-gui to GTK 4

Comment:

 Now there's GTK4 stable
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/4666#comment:3>
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