feat(ui): rename app and add input history

Import legacy SearchMyFiles settings once so the FolderScope identity change does not discard user profiles and preferences.

packaging/folderscope.desktop

@@ -0,0 +1,8 @@
+[Desktop Entry]
+Type=Application
+Name=FolderScope
+Comment=Fast advanced file search
+Exec=folderscope
+Icon=folderscope
+Terminal=false
+Categories=Utility;FileTools;