fixing the crashes and maybe speed up loading of objects in slides

TODO.org

@@ -12,13 +12,18 @@
 
 - [X] Initial ListView with text coming from =getLyricList=
 - [X] Depending on this [[*Need to make getLyricList give back the verses with empty lines as separate slides][Need to make getLyricList give back the verses with empty lines as separate slides]]
-- [ ] Need to perhaps address the MPV crashing problem for a smoother experience.
+- [X] Need to perhaps address the MPV crashing problem for a smoother experience.
+
   Essentially, mpv objects cause a seg fault when we remove them from the qml graph scene and are somehow re-referencing them. Using =reuseItems=, I can prevent the seg fault but then we are storing a lot of things in memory and will definitely cause slowdowns on older hardware. So far I haven't seen too many problems with the =reuseItems= piece yet.
 
   Apparently, I still have crashing
 
+  Setting a really high =cacheBuffer= in the ListView seems to have fixed the crashing, but will result in higher memory use. As of right now we are using 1.1Gb total, so I may think of a better solution later, but for now, that'll have to work.
+
 - [X] There is also a small hiccup in switching between songs. I appears as if songs that don't have any slides will have ghost slides from the previously selected song.
 
+- [ ] Another issue I discovered was that when switching to a song with videoBackgrounds, the mpv object doesn't ALWAYS load the first frame of the slide. Can I let the video play a tiny bit longer to make sure frames ALWAYS get loaded?
+
 ** WAIT Make toolbar functional for =songeditor= [3/4] [75%]           :core:
 [[file:~/dev/church-presenter/src/qml/presenter/SongEditor.qml::Controls.ToolBar {]]