Minor suggestions for the build plugin

Hi,

I have a few small things which I'd like to change in the build plugin:

When making the filter text for the targets  shorter (e.g. after selecting and 
building a target, and then clearing the edit line), the treeview jumps to the 
beginning of the list of the targets. Although the previously selected target 
is still selected, this is not visible. I have to scroll down manually to see 
whether it is still selected.
I would much prefer if the selected target would stay visible.
This is a one-liner in the lambda connected to 
targetFilterEdit::textChanged(), I would simply add a scrollTo(currentIndex) 
there. Ok ?

If I double click a target which comes from the project plugin, I can still 
edit it. I think this doesn't make sense, since the change will be overriden 
the next time the project plugin updates the targets. Ok to make project-
targets non-editable ?

Should non-editable targets be built when double clicking ?
Would feel comfortable for me. OTOH then they would behave differently than the 
other targets. What do you think ?

I would like to be able to change the width of the columns manually. It feels 
really annoying to me when I can't do that. There are some long target names 
which make the first column very wide, while OTOH I can't see the full commands 
for them. Basically I have to pull the kate window so it covers all my two 
screens, only then the command column becomes wide enough.
I would much prefer if I could simply drag them manually to the width I want 
(initially they should be set to something reasonable automatically of 
course).
A quick first try was not good enough, but I could invest a bit more time.
Ok, or would you object to that ?

For those small things, should I go the whole branch and merge request route ?

Thanks
Alex