Add Custom list of pair on bulk creator

[Biswajit96]

Add a custom list of pair for bulk create bots maybe much useful tool for traders.

[derrey]

Hi Marc, This feature would allow people to create a custom list of pairs that the software can use to create all the DCA Bots/Futures Bots needed. i.e. I need to create 108 Long and 108 Short futures bots for a specific strategy based on 108 pairs. I can provide the pair list for the BotCreator to generate.