Align behavior for uploaded MIB files in the web frontend and in the local directory structure

During the upload of MIB files on the web frontend, these files are converted to python (and pyc) files. But there is another way to provide MIB files for the event console: Placing them into the local directory structure below ~/local/share/snmp/mibs/. But, by going this way, the conversion script is not triggered.

As a user, I would expect to get the same result, when uploading a MIB via web or file system.