Add ability to flag pins or sets for edits

[BrightRaven]

#88 #87

We have the ability to edit text on an uploaded pin but we don't have a way to identify what needs fixing. I suggest implementing a system of flags so users and moderators can indicate to others that an edit needs to be made.

We need a new interface in the editing section. It would probably be easiest to have a series of questions or drop-down menus to guide the person to the correct flag assignment. (Like Sirena suggested for pin upload flow for general users.)

For example the flow might look like this:
"Is the issue with the image?" [Yes/No]
If yes, apply Poor Quality Image Flag
If no, ask: "Is something incorrect or missing? [Incorrect/Missing/ItsSomethingElse]
If Incorrect, provide a drop-down with "Please select the problem" and "Go Back"
If Missing, provide a drop-down with "Please select the problem" and "Go Back"
If ItsSomethingElse, provide a drop-down with "Please select the problem" and "Go Back"
etc.

Unidentified Information:

• Unidentified year
• Unidentified Affiliate/Region
• Unidentified Set Association (we don't know what set it belongs to, if any)
• Unidentified Artist (not sure if this one should be added right now, but maybe in the future)
• Unidentified Subject Matter (i.e. we have no clue what the pin is supposed to be)

Something is Incorrect:

• Incorrect Title
• Incorrect Affiliate/Region
• Incorrect Set Association
• Incorrect Artist
• Incorrect Subject Matter
• Incorrect Tag
• Incorrect Year

Miscellaneous:

• Poor Quality Image
• Needs ID (is this actually a DI pin or not)
• Missing Pin (A set is incomplete)
• Mistake Pin (There are a rare number of these because of a manufacturing defect. This pin is not representative of the majority.)

[BrightRaven]

Pulled this from another issue in the Frontend to add to the discussion:

Issues may include:

inappropriate content (foul language mostly - this will be more useful when public can submit images and tags)
typos in title, description, or tags
incorrect pin label (year, affiliate, name of set, etc.)
set is incomplete (for photos of full sets) or photo contains a pin that doesn't belong in the set
image is poor quality (bad lighting, bad cropping, blurry, low resolution, etc.)
request to combine: image is a duplicate of another pin already listed on the database (have to be careful with this one as some pins are very subtly different but appear identical at first glance)
Edits may include:

suggest a new tag
suggest a new image to add (especially for things like pins that open/move/blink)
add a pin designer
add more information about the theme of the pin or the story behind its creation