Search result list style improved

[frauzufall]

• improves command results by showing menu path behind name
• adds indicator for search result length

[imagejan]

I squashed the whitespace commit into the previous one and slightly edited the commit message to match ImageJ style.

Hope you don't mind, @frauzufall :-)

I tested this change, and seeing that many others liked it on the forum, I'm going to merge it. Hope that's fine with everybody.