powers bookmarklet should open in same tab

[Trevor-van-L]

CRE manages to do this. Having 50 tabs opened is a hassle. Would be good to update existing tab automatically

[Trevor-van-L]

BLUF: Is there an onfocus() or something similar to onload() that we can use to call loaddata() and still use the window.name property? Else we will have to look at another way to pass the data.

window.open() takes optional second param of window name. We could use this, except that window.name gets hijacked to pass data, which is only read in onload(). Name does get reset after we have loaded it.

There is a comment saying this is for passing the data across origins. I am not entirely familiar with the mechanics at play here but I guess it means we can't call loaddata() from our original entry point on the MH tab.