Play nice with vocab builder plugin

[equwal]

Looks like this plugin and vocab builder conflict because they both try to set the same button, rather than creating two buttons for example.

[nairyosangha]

I'm not sure this is going to be possible. KOReader provides a tweak_buttons_func which is called by the widget that shows the dictionary when you do a lookup. This was added specifically for the vocabbuilder plugin. I'm using the same thing, and I make sure that it gets overwritten when the reader is loaded, while vocabbuilder only calls it on startup.

Because of that, I overwrite the function set by vocabbuilder. It's not really designed in a way to be called in multiple places

[equwal]

ok then

[nairyosangha]

The guys at koreader were nice enough to allow me to make this work for me, so I can actually do this properly now after all, but I will wait for a new koreader release first

[nairyosangha]

New koreader release is out, this should no longer be a problem now (be sure to check out the latest commit here too)