* sdk: Linux, support open containing folder with file selected

git-svn-id: https://svn.code.sf.net/p/codeblocks/code/trunk@9768 2a5c6006-c6dd-42ca-98ab-0921f2732cef
- sdk: reduce trivial compile warnings

git-svn-id: https://svn.code.sf.net/p/codeblocks/code/trunk@9769 2a5c6006-c6dd-42ca-98ab-0921f2732cef