panels 7.x-3.10

Changes since 7.x-3.9:

• #2883982 by dsnopek, cboyden: Duplicate links for layout text and icon in Panels IPE (accessibility issue)
• #3032350 by zestagio, joelpittet, lmakarov: Notice: Undefined index: settings in panels_renderer_standard->render_pane() (line 572 of panels/plugins/display_renderers/panels_renderer_standard.class.php)
• #2614220 by totipotek, jacob.embree, heykarthikwithu: Undefined variable: current_page in panels_mini_block_list_alter()
• #2314603 by das-peter: Undefined index "settings" in panels_renderer_editor.class.php line 1990
• #2613756 by AexChecker, VitalyM, JosueRodrigu3z: Undefined offset: 1 in get_category()
• #1833984 by DamienMcKenna, Michelle: Deprecate Panel Nodes in favor of Panelizer
• #2538754 by sdstyles: Removed deprecated function panels_ipe_get_cache_key()
• #1829474 by jgSnell, szeidler, joachim: landing wizard 'finish' button takes you to the wrong URL
• #2897658 by dsnopek: Menu blocks disappear when editing/saving in the Panels IPE
• #2942953 by Ievgen Antonovych, vvv8, Ivan Berezhnov, anpolimus, codesquatch, joseph.olstad, matthiasm11: Block configuration link is wrong
• #2856088 by sylus, joseph.olstad, das-peter, DamienMcKenna: Panels 3.9 Code Cleanup removed clone_pane() function
• #2868593 by m.abdulqader: No icon-css.png file exists in IPE
• #3154958 by jplana: Notice: Trying to access array offset on value of type null in panels_renderer_editor->get_style()
• #2808149 by ruscoe, joseph.olstad, DamienMcKenna: Typo in panels_node submodule - "allwed_layouts" in place of "allowed_layouts"
• #2504465 by maximpodorov, osopolar, DamienMcKenna, Anybody, crmn, izmeez, ian_v, joseph.olstad, philsward, dsnopek: Visibility rules aren't saved for unlimited multiple value fields
• #2713697 by alexandrdnlv, joseph.olstad, stefan.korn, Krilo_89, gwynnebaer, mycw1991, Yury_Kaminski: Performance optimization for i18n_panels