Merge branch 'v4-dev' of https://github.com/twbs/bootstrap into v4-dev

docs/_data/browser-bugs.yml

@@ -198,16 +198,6 @@
   origin: >
     Bootstrap#16372
 
--
-  browser: >
-    Safari
-  summary: >
-    Incorrect placement of `position: fixed` element when it's a child of a `position: relative; left: X%;` element.
-  upstream_bug: >
-    WebKit#147284, Safari#21993128
-  origin: >
-    Bootstrap#16814
-
 -
   browser: >
     Safari (OS X)
@@ -310,16 +300,6 @@
   origin: >
     Bootstrap#16028
 
--
-  browser: >
-    Safari (iOS 9+)
-  summary: >
-    Sometimes excessive automatic zoom is applied after opening a modal, and the user isn't allowed to zoom out
-  upstream_bug: >
-    WebKit#150715
-  origin: >
-    WebKit#138201
-
 -
   browser: >
     Safari (iPad Pro)