SciDAVis - Improvements SVN-temp

Usability fixes: activate window on Project Explorer item click
Don't maximize if not active
Maximize if active
Set Normal if Maximized
Don't activate on rigth click

Support for the MXE cross-compilation environment.

Branched development to create a development branch for porting
scidavis to qwt 6

Still work in progress - doesn't compile yet.

Fix Multilayer Unicode name support
This fix Graphs file names when exporting

Fix Folder's name Unicode support

Revert "Load Table from project file directly"
This commit may not work as expected.
See [1430] for details.

This reverts commit [r1423]

Revert "Write Table to project file directly"
This changes doesn't work as expected, because SciDAVis before [r1423]
want symbols count, but here we calculate bytes count.

This reverts commit [r1424]

Fix paste non-latin text from clipboard to Table/Matrix

Fix paste to matrix with MacOS-style (\r) EOL's
Similar to #232

Minor change: rewrite RegExp in previous commit to prevent compiler warnings