Waedc qtc

Mixed in my changes for the bandmap mode.

There is also a fix for the qtc_get() function. If no qtc_stroe is initialized the functioned returned NULL and
functions using the return value could crash. Now we return an empty entry instead.

I did not incorporate the additional newlines for the qtc texts yet. I see no point in defining it. Can you give a comment please why that is needed?

The pull request contains also some fixes for unneeded trailing spaces.