#154 "Export Image" in the File menu, segfaults if Text file in the view

[Guilherme]

Reported by Jose Manuel Campelo

Another thing that I would like to comment is that I realized that if you have the Verilog-A modules in the active tab of the program, and, by mistake, you choose "Export Image" in the File menu, the program closes without any warning.

[Guilherme]

Fixed, only enable "Export Image" for schematic documents.