citra-qt: Add customizable speed limit target
* Update SDL config for the new frame_limit option
* Made max lag time a function of target speed percent.
* Added a checkbox to enable/disable frame limiter
* UI: Prevent frame_limit from under/overflowing
* UI: Hide target speed percent when frame limiter is off
* Disable frame limit spin box when framelimit isn't enabled
* added a SidebySide Layout
* Reworked, so both screen have the same height and cleaned up screen translates.
* added the option in the UI, hope this is the right way to do it. formated framebuffer_layout.cpp
* delete the x64 files
* deleted ui_configure_graphics.h
* added Option for the Layout in the xml
* got rid of SIDE_BY_SIDE_ASPECT_RATIO because it was useless. pulled translate into variables
* changed shift variables to u32 and moved them in their respective branch. remove notr="true" for the Screen layout drop down
* reworked intends :). changed function description for SideFrameLayout
* some description reworking
