UX Improvements: Keep Cursor Position & Split Size

[MarioRicalde]

When using :Reject the quickfix split will reload causing the following issues:

• Cursor position is lost, making the user loose context.
• The split resizes to it's default size, making the user loose even more context.

A way to partially work around this is to setup a mark m a, and then use ' a to go back to a somewhat relevant position.

If there is no way to work around re-rendering the list, perhaps it's possible to separate the marking process from the actually "removing" process.

Related issue: #120

[MarioRicalde]

The marks workaround seems to be pretty reliable for the time being, and works "good enough" for the flow where you are Selecting Lines and :Rejecting them.

[romainl]

Using marks sounds good but I wouldn't want to lo loose the user's marks. This means that the mark must be saved with something like getpos() and restored with something like setpos().

[MarioRicalde]

Any pointers as to where could someone add those changes in the plugin, I may be able to allocate some time to look into this one.