[orca-list] I doed a bugfix with shortcut spokening related

[Hammer Attila <hammera pickup hu>]

Hy,

I opened following bugreport with accelerator and shortcut spokening 
related, hopefuly any attached fix is acceptable:
https://bugzilla.gnome.org/show_bug.cgi?id=640795
I doed a modification with src/orca/script_utilities.py file, and make 
two variant patch.
The first patch using the "plus" marking translation word with 
accelerator modifier keys separation, this is happening too with 
mnemonic keys with have a modifier key, for example dialog controls. For 
example:
Old Orca spokened output:
"settings button
Alt s"
New output:
"Settings button
Alt plus s"
The second variant not using marking translation, using separation with 
normal + character.
Example output:
"Settings button
Alt + s"

Please look and test any patch, hopefuly any fix is possible committing 
if my fix way is good.
Note:
Not better replacing the "Shift Control letter" acceleration order with 
"Control Shift letter" order? If better this form, I welcome doing this 
after I known possible committing my any fix variant or not, because the 
replacement method depending what final form will be accepted (must 
modifier separation word or character or not).
I tested both two patch with acceleration haved menues and dialog 
controls for Orca preferences dialog.

Attila