Various fixes

[frankrousseau]

Problem

• Pinned revisions can be confused with being the last revision.
• Task columns with no department are hidden when a department filter is selected in entity pages.
• Shots loading doesn't occur when the episode is changed outside of the shot page.
• The set current frame as thumbnail option selects the previous frame instead of the current frame.
• Task type stats is not properly displayed in the production page.

Solution

• Change revision label to "Pinned Revision" for revisions in pinned comments
• Include task columns with no department in the selected column when a department is selected
• Check if the episode changed on Shots page mount.
• Add 1 frame to the selected frame to match ffmpeg way of counting frames
• Use the right number to compute the width of colored bars showing the amount of tasks for each status

[NicoPennec]

Please add a comment on this line to explain why "+ 1".
It will be easier to read and understand the code later (git blame is not viable over time)