Various new icon graphics by LordBob and button definitions using them

The 'help_30' icon is a Ariel question mark generated with the text tool
in Gimp and not drawn by LB.

data/gui/widget/button_25x25.cfg

@@ -339,22 +339,76 @@
 	[/resolution]
 #enddef
 
-#define _GUI_DEFINITION_MINIMAL ID DESCRIPTION IMAGE
+#define _GUI_DEFINITION_MINIMAL SIZE ID DESCRIPTION IMAGE
 [button_definition]
 	id = {ID}
 	description = {DESCRIPTION}
 
-	{_GUI_RESOLUTION_MINIMAL () 25 ({IMAGE})}
+	{_GUI_RESOLUTION_MINIMAL () ({SIZE}) ({IMAGE})}
 
 [/button_definition]
 #enddef
 
-{_GUI_DEFINITION_MINIMAL
+{_GUI_DEFINITION_MINIMAL 25
 	"close"
 	"Minimal-style close button."
 	"icons/action/close_25"
 }
 
+{_GUI_DEFINITION_MINIMAL 25
+	"trash"
+	"Minimal-style trash button."
+	"icons/action/trash_25"
+}
+
+{_GUI_DEFINITION_MINIMAL 30
+	"settings"
+	"Settings button"
+	"icons/action/settings"
+}
+
+{_GUI_DEFINITION_MINIMAL 72
+	"addon_install"
+	"Minimal install button"
+	"icons/addons/addon_install"
+}
+
+{_GUI_DEFINITION_MINIMAL 72
+	"addon_uninstall"
+	"Minimal install button"
+	"icons/addons/addon_uninstall"
+}
+
+{_GUI_DEFINITION_MINIMAL 72
+	"addon_upgrade"
+	"Minimal install button"
+	"icons/addons/addon_update"
+}
+
+{_GUI_DEFINITION_MINIMAL 30
+	"install"
+	"Minimal install button"
+	"icons/addons/install"
+}
+
+{_GUI_DEFINITION_MINIMAL 30
+	"uninstall"
+	"Minimal install button"
+	"icons/addons/uninstall"
+}
+
+{_GUI_DEFINITION_MINIMAL 30
+	"update"
+	"Minimal install button"
+	"icons/addons/update"
+}
+
+{_GUI_DEFINITION_MINIMAL 30
+	"help_30"
+	"Minimal install button"
+	"icons/action/help_30"
+}
+
 #undef _GUI_DEFINITION
 #undef _GUI_DEFINITION_MINIMAL
 #undef _GUI_RESOLUTION