Pull request #2492: BI-101293 fix: popover的header不居中

Merge in VISUAL/fineui from ~WINDY/fui:master to master

* commit '9bbd430e073804d7a27f0ee40bedf2ef6569a5b6':
  BI-101293 fix: popover的header不居中

src/base/layer/layer.popover.js

@@ -75,6 +75,8 @@ BI.Popover = BI.inherit(BI.Widget, {
                                 title: o.header,
                                 textAlign: "left"
                             },
+                            top: 0,
+                            bottom: 0,
                             left: BI.SIZE_CONSANTS.H_GAP_SIZE,
                             right: o.closable ? 0 : BI.SIZE_CONSANTS.H_GAP_SIZE
                         }]