Address server sever event spam when a client enters a shop poly

[techy2493]

Describe Pull request Don't update the shop list until the client presses E while in the shop poly. (Original code causes client disconnects due to network overflows and breaks store robberies)

If your PR is to fix an issue mention that issue here

Questions (please complete the following information):

• Have you personally loaded this code into an updated qbcore project and checked all it's functionality? [yes/no] (Be honest) Yes
• Does your code fit the style guidelines? [yes/no] Yes
• Does your PR fit the contribution guidelines? [yes/no] Yes

[techy2493]

Addresses #144