preferences: Don't store translated column IDs (bgo#731428)
meldapp: Resolve relative paths in local process (bgo#731291)

When handing off filenames to the remote process, we need to resolve
relative paths relative to the cwd of the invoking process, not the
process that ends up opening the file.
Updated Brazilian Portuguese translation
Updated Spanish translation
gutterrendererchunk: Don't draw actions for equal chunks
Updated Spanish translation
Updated Slovenian translation
melddoc: Handle spaces in filenames with external editor (bgo#732089)
Updated Czech translation
WIP: Port to C++