Rename most device icons to comply with XDG standards
(cherry picked from commit 9f93d0db550659f9440a086ab69e7590b35dbee1)

diff --git a/plugin/simplestyle.cpp b/plugin/simplestyle.cpp
index e876c45..cd65c13 100644
--- a/plugin/simplestyle.cpp
+++ b/plugin/simplestyle.cpp
@@ -446,19 +446,19 @@
 			retswitch = 3;
 			break;
 		case QStyle::SP_DriveFDIcon:
-			iconLookupName = "3floppy_unmount";
+			iconLookupName = "media-floppy-3_5";
 			retswitch = 3;
 			break;
 		case QStyle::SP_DriveHDIcon:
-			iconLookupName = "hdd_unmount";
+			iconLookupName = "drive-harddisk";
 			retswitch = 3;
 			break;
 		case QStyle::SP_DriveCDIcon:
-			iconLookupName = "cdrom_unmount";
+			iconLookupName = "media-optical-cdrom";
 			retswitch = 3;
 			break;
 		case QStyle::SP_DriveDVDIcon:
-			iconLookupName = "dvd_unmount";
+			iconLookupName = "media-optical-dvd";
 			retswitch = 3;
 			break;
 // 		case QStyle::SP_DriveNetIcon: