Set default workbench preference for the view limit to 1000, which is
what we believe the most practical value on most platforms to avoid UI
freezes in large viewers.

Note: this limit can also be disabled in products by specifying
`org.eclipse.ui.workbench/largeViewLimit=0` in the
plugin_customization.ini file.

Fixes https://github.com/eclipse-platform/eclipse.platform.ui/issues/1425