CLI: Simplify ignore paths.

Fixes #2656 (-i Give path to ignore does not ignore if start of the
path is different than checked path)

Simplify paths given as -i options. This makes it easier to match
the paths as simplifying removes redundant parts.

cli/cmdlineparser.cpp

@@ -386,6 +386,7 @@ bool CmdLineParser::ParseFromArgs(int argc, const char* const argv[])
             if (!path.empty())
             {
                 path = Path::fromNativeSeparators(path);
+                path = Path::simplifyPath(path.c_str());
                 path = Path::removeQuotationMarks(path);
 
                 // If not "known" filename extension then assume it is path