Missing icons

[tsteinruecken]

While merging the current status of this repo in the admin i've discovered that a few icons went missing or are now needed for ViUR3. I'm currently missing icons for:

• switching view from icon to table view and vice versa
• the csv-export action
• opening the (large) text-editor
• distinction between "Save & Close" and "Save & Continue" (or "Save & Add new Entry")

Furthermore, we have now more states for a bone in an edit-view (each state should have it's own icon):

• Not set/unknown (eg used when opening an add formular before a bone has been touched by the user)
• Invalidates other (this bone itself is okay, but due to it's value another bone has become invalid)
• Empty (This bone is empty, but it's also not required, so it's still possible to submit the formular)
• Invalid (The formular cannot be saved as this bone contains an invalid value (or the bone is empty and required))
• Okay (The content of this bone have been validated)

[phneutral]

With the new icon set we don't intend to create an icon for every other occasion, instead reuse fitting icons as much as possible. Studies have shown that buttons without a text label perform poorly, thus we do recommend to see the icon as an additional indicator.

• icon / table view switch: we have to add these, they are already in use in several customer projects
• action csv-export: download-file or download seem fitting for the purpose
• open text editor: just plain old edit?
• save actions: we have several icons in this regard save, save-all, save-file — the Vi uses save-file for both buttons, but highlights the preferred option as btn--primary

We already have feedback from several customers that too many labels in the edit-view are confusing. We should aim to reduce the number of labels not adding more and more.

• Invalid: error or cancel
• Okay: save