Add copy (Ctrl+c) hotkey

[pedro-nonfree]

I see #292 open, but I see it very unaccurated (then difficult to close or focus on it). Can we simplify it to the most important hotkey?: Copy the secret/password.

So today I finally switched/migrated from keepassx to pass and for me it is very important to manage qtpass entirely with the keyboard (as I was doing with keepassx plus a tiling desktop like i3wm.org) [1] and I'm only missing the copy feature with the keyboard. I know I can do it with mouse and is very useful, but the way I work I need the copy-paste thing

[1]

1. launcher -> qtpass
2. Ctrl+F: search thing
3. move with arrows and copy paste

[sjau]

I'm not sure if it's the same issue that I have.

I run qtpass, I search for some entries. All my entries are multiline becuase I usually add username, password, email, url and other info as well.

So, in qtpass in the right pane (where the decrypted info is displayed), I just want to select the username or password with the mouse and then press "ctrl-c" to copy it. However that does not work. I have to use right mouse-button and then select "copy" to get the selected text copied to the clipboard.

[nh2]

I just want to select the username or password with the mouse and then press "ctrl-c" to copy it. However that does not work. I have to use right mouse-button and then select "copy" to get the selected text copied to the clipboard.

I have this problem as well; extracted into #498, as it is a different problem than what this issue is about.