MinimapFuncBox: "Show featured map" -> "Show featured mapS"

ActionHandler: tweak code comment
ContextMenus.cs: fix "close" button not working on PM tab (Chat Tab)
BattleListTab ,BattleListControl, Config: add "Hide Passworded" battle button, and renamed "Show Full" to "Hide Full" & "Show Empty" to "Hide Empty" to reflect the filter behaviour of this checkboxes. ("Hide" to hide instead of "Show" to unhide)
Merge pull request #172 from xponen/zkl_some_ui_tweak

ZKL: add "Hide passworded", fix 'close' button not working on PM tab, some grammar fix