make load button reload a changed json file

[nilsbecker]

the we viewer requires me to re-choose a changed profile file with unchanged name. it would be more convenient if i could just click the load button again.

[nilsbecker]

not sure if the report above is correct - now the reloading appears to have worked although before it did not seem to work...

[nilsbecker]

hmm, now it did not work again. so i think i can say, the reload functionality does not work consistently atm.