loleaflet: handle all transparency fill types

Also handle 'NONE' and 'SOLID' style types now emitted as part of
.uno:FillFloatTransparence statechange message.

Without this the mobile wizard does not show the transparency fill
types correctly for these cases.

Change-Id: Iffecc6dbfbac097310c9c5f53ba3b4dfe39e4756
Reviewed-on: https://gerrit.libreoffice.org/c/online/+/90879
Tested-by: Jenkins CollaboraOffice <jenkinscollaboraoffice@gmail.com>
Reviewed-by: Andras Timar <andras.timar@collabora.com>

loleaflet/src/control/Control.JSDialogBuilder.js

@@ -147,6 +147,12 @@ L.Control.JSDialogBuilder = L.Control.extend({
 
 	_gradientStyleToLabel: function(state) {
 		switch (state) {
+		case 'NONE':
+			return _('None');
+
+		case 'SOLID':
+			return _('Solid');
+
 		case 'LINEAR':
 			return _('Linear');