Fixes #378
Fixes #253

Please provide some details about this pull request:

• Store username and password in profile file
• Change min window size / dialog size for profile

ToDo:

• Add a note if profile file is not encrypted
• Set the password in profile dialog
• Validate the profile file (disable button)
• Use the password on connect

By submitting this pull request, I confirm the following:

• I have read and understood the contributing guidelines and the code of conduct.
• I have have added my name, username or email to the contributors list or don't want to.
• The code or ressource is compatible with the GNU General Public License v3.0.