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/plugin.h

@@ -157,7 +157,7 @@ int plugin_open(const char *plugin, const char *parameter);
 #define PLUGIN_MAGIC 0x526F634B /* RocK */
 
 /* increase this every time the api struct changes */
-#define PLUGIN_API_VERSION 255
+#define PLUGIN_API_VERSION 256
 
 /* update this to latest version if a change to the api struct breaks
    backwards compatibility (and please take the opportunity to sort in any
@@ -946,6 +946,11 @@ struct plugin_api {
 #endif
     /* new stuff at the end, sort into place next time
        the API gets incompatible */
+#ifdef HAVE_TAGCACHE
+#ifdef HAVE_TC_RAMCACHE
+    bool (*tagcache_is_in_ram)(void);
+#endif
+#endif
 };
 
 /* plugin header */