CATTY-643 Show warning for downloaded project that contains Web request bricks

[tom-reith]

Description: After the user downloads a project from share, and the project contains a "Send web request" brick, then when the user for the first time opens the project (enters the project in the IDE), a warning notification shall be shown.
There is only an OK button. Once the user pressed that button once, the warning is not shown again.

This warning shall be shown even if the URL is in the list of trusted domains.
This warning shall not be shown for projects created on the user's device.

https://jira.catrob.at/browse/CATTY-643

Changes done:

• Add new function to check if warning should be shown.
• Add new text

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