v3.0.0 Update with Major Changes

This update contains huge changes and a few bug fixes!

Change Log:
New :
1. Now the password which is generated can be saved as a ".txt" file.
2. Now no of characters to be generated can be selected ranging from 4 - 16
3. Added a Easter Egg, try to find it!
Bug Fixes :
1. Icon for the app has been brought back
2. Fixed a bug that saved a blank file when cancel is selected in the File Save Dialog
3. Fixed that the Generate Random Password button was not perfectly aligned