* Qt: fix layout of "experimental build warning" for dpi scaling
and remove compiler warning in welcome_dialog.ui
* Qt: smoothen gamelist/-grid scrolling by setting singlestep value
and fix missing scroll and deselect on gamegrid
* Qt: show all bootable categories in gamegrid
* emulator tab: minor layout adjustment
* tool bar: adjust size dynamically for hidpi
* gamelist tool bar: adjust size dynamically for hidpi
* gamelist search bar: adjust style
* move game_list.h into rpcs3qt
* hide game data by default