Feature/hide show dialog

[dnagpal1]

Why?

Feature Request: #317

Problem: Currently users are now able to hide node modules while using the chatbot. This feature allows them to hide the UI while keeping functionality of the chatbot.

Solution: Added a toggle button next to node modules creation button to hide/show all node modules. According to React Flow documentation this function loops through all existing flows and hides them.

Test Plan: Manually checked hiding pre-existing marketplace node modules and adhoc created node modules.

[CLAassistant]

All committers have signed the CLA.

[HenryHengZJ]

hey @dnagpal1 thanks for the PR! In future we will implement a standalone chat application that connect to your flow. Therefore, I dont think hide/unhide nodes in flow fits the product UI/UX.

Unfortunately I will have to decline the PR for now, thanks again for the effort!