At this point there are a lot of blocks with the icon on the left and the text on the right. It would be good to abstract this into a separate function so this functionality isn't duplicated everywhere.

There could be a function called something like the following that could do all the sizing,

uiBlock *wm_popup_with_icon_create(bContext *C, 
                                   ARegion *region, 
                                   const char *block_name, 
                                   const eAlertIcon icon, 
                                   const int dialog width);

That wouldn't necessarily have to be a prerequisite for this patch, but I don't like the idea of duplicating this logic in multiple places.

@Hans Goudey (HooglyBoogly) - ...It would be good to abstract this into a separate function so this functionality isn't duplicated everywhere.

uiBlock *wm_popup_with_icon_create(bContext *C, 
                                   ARegion *region, 
                                   const char *block_name, 
                                   const eAlertIcon icon, 
                                   const int dialog width);

That would be nice if we could also pass a desired display width for the icon. That way it would also apply to the "About" dialog too. There might also be a future case where we might show these alert icons a bit smaller as well, used on a replacement for our current "confirm operator" dialogs (the ones that have the "OK?" title).

D9486: Helper to add an Alert Icon and creates a split layout for popups

This means a Text data-block, it can be "Script" as and alternative.

BLI_snprintf(G.autoexec_fail, sizeof(G.autoexec_fail), "Text '%s'", text->id.name + 2);
printf("scripts disabled for \"%s\", skipping '%s'\n", BKE_main_blendfile_path(bmain), text->id.name + 2);

The "Driver" is used in other cases.

BLI_snprintf(G.autoexec_fail, sizeof(G.autoexec_fail), "Driver '%s'", expr);
printf("skipping driver '%s', automatic scripts are disabled\n", expr);

But this is definitely for a different patch.