Allow resizing of the columns in the files view

[atilas88]

Describe the solution you'd like Resizeable columns in the files view so the columns names can be read when language is changed to Spanish so that they are not cut off with "..." Columns (size and modified)

[MaximeMaW]

In addition to displaying full column names, this will optimize space usage when having big screens. In the screenshot below I have kilometers of free space, but the tags are partly hidden.