[Mobile] Avoid the autofocus of the filename input when choosing a destination

[Kcchouette]

Is your feature request related to a problem? Please describe.
I'm always frustrated when I use airdcpp on Mobile and I try to download a file

Describe the solution you'd like

1. Go on your airdcpp mobile
2. Choose a filelist
3. Choose a file, choose "download to..."
4. Go on "Browse" and choose the destination
5. The keyboard is open, in the filename input (to rename the file)

The goal is to avoid that opening (and so the autofocus of the filename input)

[Kcchouette]

It's a pain to close manually the keyboard each time you navigate...