all that has changed is this:
#mdocs-list-table #batch { width: 1%; }
#mdocs-list-table { background: #fff; }
#mdocs-list-table .mdocs-sort-option, .mdocs-folders { cursor: pointer; }
#mdocs-list-table .mdocs-desc { width: 15%;}
#mdocs-list-table .mdocs-downloads { width: 12%; }
#mdocs-list-table .mdocs-version { width: 9%; }
#mdocs-list-table .mdocs-owner { width: 9%; }
#mdocs-list-table .mdocs-real-author { width: 9%; }
#mdocs-list-table .mdocs-modified { width: 15%; }
#mdocs-list-table .mdocs-rating { width: 10%; }
#mdocs-list-table .mdocs-download { width: 12%; }
#mdocs-list-table .mdocs-file-size { width: 10%; }
from this:
#mdocs-list-table #batch { width: 1% !important; }
#mdocs-list-table { background: #fff; }
#mdocs-list-table .mdocs-sort-option, .mdocs-folders { cursor: pointer; }
#mdocs-list-table .mdocs-desc { width: 15% !important;}
#mdocs-list-table .mdocs-downloads { width: 12% !important; }
#mdocs-list-table .mdocs-version { width: 9% !important; }
#mdocs-list-table .mdocs-owner { width: 9% !important; }
#mdocs-list-table .mdocs-real-author { width: 9% !important; }
#mdocs-list-table .mdocs-modified { width: 15% !important; }
#mdocs-list-table .mdocs-rating { width: 10% !important; }
#mdocs-list-table .mdocs-download { width: 12% !important; }
#mdocs-list-table .mdocs-file-size { width: 10% !important; }
the simplest solution for you is to add this to your themes css that should fix your issue. But you should look into fixing your css issue from the root cause.
And yes your css is effecting the backend as well.