PictureFlow: Minor fixes & changed defaults

- Fix FPS counter overlapping
the artist string when
"Show album title" was set to
"Show album and artist at the top"

- Fix disappearance of center album
if certain Settings menus had been
accessed while list of tracks was
showing and you then returned to the
list of albums

- Fix disappearing album artwork after
cache had been created until you started
scrolling

- Enable context menu even if WPS
integration is disabled

- Make splash screen appear only
on first launch and for database
updates, when it is actually on screen
for long enough

- Eliminate 'Loading' splash if tagcache
is in RAM

- Show both album and artist by default on
displays whose height > 100px

Change-Id: Ie70c0d9093789294d288a4f88338ee4a588bf4a5

apps/tagcache.c

@@ -170,7 +170,7 @@ static const char * const tag_type_str[] = {
 #endif /* ndef LOGF_ENABLE */
 
 /* Status information of the tagcache. */
-struct tagcache_stat tc_stat;
+static struct tagcache_stat tc_stat;
 
 /* Queue commands. */
 enum tagcache_queue {
@@ -5079,6 +5079,12 @@ bool tagcache_is_usable(void)
 {
     return tc_stat.initialized && tc_stat.ready;
 }
+#ifdef HAVE_TC_RAMCACHE
+bool tagcache_is_in_ram(void)
+{
+    return tc_stat.ramcache;
+}
+#endif
 int tagcache_get_commit_step(void)
 {
     return tc_stat.commit_step;