Android version update

Nice Mind – Android version v6.9

1. Optimize the floating menu when a node is selected

2. Optimize the icon for text editing

3. Optimize the interface of WiFi transmission in dark mode

4. Fix the problem that the thumbnails of some models are blurred

Nice Mind – Android version v6.8

1. Add WiFi transfer function

2. Add Nice Mind user guide map

3. Optimize the saving of outline mode

4. Fix some known bugs

Nice Mind – Android version v6.7

1. Support exporting branches

2. Fix the problem that dragging nodes in outline mode will crash

3. Fix the problem that some system mobile phones cannot be reminded normally

Nice Mind – Android version v6.5

1. Fix the problem that the table layout cannot be dragged to change the position

2. Fix some known bugs