Fix preview page menu link + improve preview link text

Author: wilzbach

changelog/changelog.ddoc

@@ -72,5 +72,5 @@ PHOBOSPR = $(PULL_REQUEST phobos,$1)
 _=
 
 CHANGELOG_VERSION = $(LI <a id="$1" href="$1.html">$1</a><span class="hide-from-nav"> ($2, $3)</span>)
-CHANGELOG_VERSION_PRE = $(LI <a id="$1" href="$1_pre.html">$1</a><span class="hide-from-nav"> ($+)</span>)
-CHANGELOG_VERSION_NIGHTLY = $(LI <a id="pending" href="pending.html">Nightly</a>)
+CHANGELOG_VERSION_PRE = $(LI <a id="$1" href="$1.html" style="display: inline-block">$1</a> (preview) <span class="hide-from-nav"> - scheduled for $+</span>)
+CHANGELOG_VERSION_NIGHTLY = $(LI <a id="pending" href="pending.html">Nightly</a> <span class="hide-from-nav"> (preview) - upcoming changes from $(D master)</span>)