interface & app_server: Fix missing parentheses near ternary operators.

+ has greater operator precendence than ?, so we need parentheses when
using both in expressions. Both of these look like actual bugs.

Spotted by Clang.

src/kits/interface/BMCPrivate.cpp

@@ -352,5 +352,5 @@ _BMCMenuBar_::_Init()
 	left = right = be_control_look->DefaultLabelSpacing();
 
 	SetItemMargins(left, top,
-		right + fShowPopUpMarker ? kPopUpIndicatorWidth : 0, bottom);
+		right + (fShowPopUpMarker ? kPopUpIndicatorWidth : 0), bottom);
 }

src/servers/app/DelayedMessage.cpp

@@ -299,7 +299,7 @@ DelayedMessageData::DelayedMessageData(int32 code, bigtime_t delay,
 	bool isSpecificTime)
 	:
 	fCode(code),
-	fScheduledTime(delay + isSpecificTime ? 0 : system_time()),
+	fScheduledTime(delay + (isSpecificTime ? 0 : system_time())),
 	fValid(false),
 
 	fAttachments(3, true),