MiniProjectTargetSelector very small

the `MiniProjectTargetSelector` is rather small, only having space for 8 entries. my cmake project has quite a large number of targets, so it's a bit cumbersome to select a target from the list. on the other had i have a rather large screen so about 6 of the `MiniProjectTargetSelector` would fit onto the screen. it would be a nice quality of life improvement for large projects, if the widget could be a bit larger if the target list has many entries