Fatal when Genesis Not Enabled [Has Patch]

Currently the plugin uses register_activation_hook to check for the required version of Genesis is installed. However, it’s possible to activate Genesis, then the Genesis Tab plugin and then switch to another theme (say Twenty Sixteen). If you’re not using the thumbnail view the tabs continue to work. However, if you are then you’ll get the following error:

PHP Fatal error: Uncaught Error: Call to undefined function genesis_get_image() in /wp-content/plugins/genesis-tabs/plugin.php:148

I’ve put together a series of patches to fix this:

1) Check for genesis_get_image() before the function call:
https://gist.github.com/BandonRandon/96341f371dd555d40ffdb7a02d6f6d1b

2) Also run register_activation_hook on after_switch_theme
https://gist.github.com/BandonRandon/599590d8a6b59ec71ccdbad166491791/fac08fdd40e887d639c009421f5ad8d840caa8b4

3) Change wp_die to admin_notice this is a friendly message and works where wp_die is being filtered by the host/platform
https://gist.github.com/BandonRandon/599590d8a6b59ec71ccdbad166491791/e9b63a1b2c8101cc60f5c7d28208e60f56b1863a

3.1) Same thing but without after_switch_theme code:
https://gist.github.com/BandonRandon/a51978a14ebb27cbc583a2b6bba79c9a

Hopefully this can help others in the same situation of having trouble switching themes with the plugin in use.