docinfo-plugin: Do not leak the action group.
docinfo-plugin: Use gresource
docinfo-plugin: GtkTable replaced with GtkGrid
docinfo-plugin: Use g_clear_object in dispose
docinfo-plugin: Make labels selectable, but not focusable.
docinfo-plugin: Add a BUILT_SOURCES variable
docinfo-plugin: Do not leak the action group. docinfo-plugin: Use gresource docinfo-plugin: GtkTable replaced with GtkGrid docinfo-plugin: Use g_clear_object in dispose docinfo-plugin: Make labels selectable, but not focusable. docinfo-plugin: Add a BUILT_SOURCES variable
These commits are backported from https://gitlab.gnome.org/GNOME/gedit/-/tree/master/plugins/docinfo
Do not merge before #615