[REQ] [UX] Change compression settings before compress

**Is your feature request related to a problem? Please describe.**
It's a UX thing. Def. not urgent. But I was so confused about changing compression settings.

### TLDR
The "Drag & drop" compression window looks like a Preference window.
I thought it saves my settings after I close it. And thought I can right click and compress with what I selected.

**Thought process of my first attempt of "Compress with Keka"**

1. Launch Keka to see what's there
2. Found out it's like a "Preference" window.
3. Can't see "New Archive" button. Expect integrated in right click menu.
4. Set what I want. "High compression ratio", 7z, etc...
5. Close the window. Expect auto save, because no "Save" button.
6. Highlight files on desktop, right click->Services->Compress using Keka
7. It's ZIP format. See the "Downward Arrow" button, expect "Options" from it, although I know it usually means choose location.
8. Close the whole thing. Because I was right.

9. Highlight files on desktop, right click->Services. Options are "Send to Keka", "Extract using Keka", "Compress using Keka"
10. Click "Send to Keka". That's most likely it if "Compress using Keka" is not what I want.
11. Saw the same thing. Still don't understand what's "Send to Keka"

Then I find out I cannot close that "Preference" window after two more attempts.
Also find out that that's not the actual "Preference" window. I found out the actual "Preference" in menu bar, I know I can change the default compression settings.

I though I need to open Keka, keep the "Temporary compression settings" window. And right click on files to "Compress using Keka". I only found out that is a Drag & Drop thing after Googling.

**Describe the solution you'd like**
A clear and concise description of what you want to happen.

1. Add an area with dashed border, indicating that the window is waiting for a drag and drop action. (Example: [https://imgur.com/a/62ZLpg8](https://imgur.com/a/62ZLpg8) )

2. Add a "Compression settings" button in the "Compress with Keka" window

**Describe alternatives you've considered**
A clear and concise description of any alternative solutions or features you've considered.

All written in the previous section

**Additional context**
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