Allow the user to select the network

[AhmedHanafy725]

maybe a dropdown menu with the supported networks and allow user to input his/her mnemonic

[maayarosama]

Work In progress :

• Added a profile store to store user's mnemonic and chosen network
• If the profile is set , it will set the client, Currently I'm facing the following error Error: Cannot convert 'V14' via asV0

[maayarosama]

Work Completed:

• Updated app title
• Added validation to forms
• Profile store and client store are now initialized with mnemonics and network provided by the user
• Added a window interface and a helper method getDefaultUrls to set URLs according to the network provided by the user

Work In Progress(WIP);

• Fixing build issue
• Adding logout
• Updating network without logging out
• clearing forms after submit