Original work by tox-user.
The default theme is now placed in a different path:
- C:\users\%username%\AppData\roaming\qtox\themes - for Windows
- ~/Library/Application Support/qtox/themes - for MacOS
- ~/.config/qtox/themes - for other Unix systems including GNU/Linux
Thanks to that it's no longer required to recompile the program to modify
the theme.
In addition to that the default theme is also included as a resource. If
the theme folder or some file inside it is missing, qTox will load it
from resource.
This makes the class more widely usable, since deallocating an object of
this class no longer needs to have the `CallConfirmWidget` definition
present. The header file forward-declares `CallConfirmWidget`, so it's
not a complete type if only `chatformheader.h` is included.
With an incoming call, the confirmation window (CallConfirmWidget) is only displayed
when the caller is on the active tab. In other cases, the call confirmation window
is not displayed, as a result, the call cannot be answered.
The problem is manifested in Kubuntu 14.04 and Ubuntu 16.04 MATE (Qt 5.6.3/5.9.3)
