Got rid of unecessary QHBoxLayout during setup of _playlistTabs.
Created a QVector that holds all valid playlist items.
Created QVector to hold all playlistview items, and fixed misc. bugs.
Played with key events.
Added button to add new playlist tab.
Added slot function for adding new playlist tab, and made tabs closable.
Need to finish implementing closing of tabs.
Fixed crashing error...oops.
Fixed tabs (hopefully), but some media playback logic is still clunky.
Fixed issue with refreshPlaylistView().
Still working on small issues with tabs.
Almost fixed bug I think... has to do with durationHasChanged function.
Fixed issue with song highlighting and label. Now program crashes on exit sometimes.
Fixed issues with the open() function.
Successfully compiled and deployed on android.