DOC: supress warnings with okwarning in whatsnew
Merge pull request #6086 from jorisvandenbossche/doc-warnings

DOC: suppress warnings with okwarning in whatsnew
DOC/BLD: ipython_directive cleanups
BUG: ensure plt is imported before it's used in hist_frame
Merge pull request #6094 from dsm054/reorder-hist_frame-import

BUG: ensure plt is imported before it's used in hist_frame
DOC: remove warnings in panel.apply docs (GH6087)
TST: disable get_components_yahoo tests as unreliable