Brightness setting on full screen not around the window border and brightness stays set on screen after trem close

[bananameth]

Problem: Brightness setting is set on the full screen in windowed mode not just the trem window and brightness remains changed after trem has closed making the screen too bright.

Steps to recreate: On Win 10 alpha 13 client with client set to windowed mode, start and click options on start up screen, make video brightness full. Drag window to second monitor, click quit, original monitor stays bright and requires a reboot to fix.

from my autogen.cfg in gpp folder:
seta r_centerWindow "0"
seta r_allowResize "0"
seta r_screenshotJpegQuality "90"
seta r_aviMotionJpegQuality "90"
seta r_marksOnTriangleMeshes "0"
seta r_anaglyphMode "0"
seta r_railSegmentLength "32"
seta r_railCoreWidth "6"
seta r_railWidth "16"
seta r_facePlaneCull "1"
seta r_gamma "2.000000"
seta r_swapInterval "0"
seta r_textureMode "GL_LINEAR_MIPMAP_LINEAR"
seta r_finish "0"
seta r_dlightBacks "1"
seta r_dynamiclight "1"
seta r_drawSun "0"
seta r_fastsky "0"
seta r_ignoreGLErrors "1"
seta r_stereoSeparation "64"
seta r_zproj "64"
seta r_flares "0"
seta r_lodbias "0"
seta r_lodCurveError "250"
seta r_ignoreDstAlpha "1"
seta r_shadowCascadeZBias "0"
seta r_shadowCascadeZFar "1024"
seta r_shadowCascadeZNear "8"
seta r_shadowMapSize "1024"
seta r_shadowBlur "0"
seta r_shadowFilter "1"
seta r_sunShadows "1"
seta r_sunlightMode "1"
seta r_drawSunRays "0"
seta r_genNormalMaps "0"
seta r_imageUpsampleType "1"
seta r_imageUpsampleMaxSize "1024"
seta r_imageUpsample "0"
seta r_mergeLightmaps "1"
seta r_pshadowDist "128"
seta r_dlightMode "0"
seta r_glossType "1"
seta r_baseGloss "0.3"
seta r_baseSpecular "0.04"
seta r_baseParallax "0.05"
seta r_baseNormalY "1.0"
seta r_baseNormalX "1.0"
seta r_pbr "0"
seta r_cubemapSize "128"
seta r_cubeMapping "1"
seta r_parallaxMapping "0"
seta r_deluxeMapping "1"
seta r_specularMapping "1"
seta r_normalMapping "1"
seta r_ssao "0"
seta r_depthPrepass "1"
seta r_autoExposure "1"
seta r_toneMap "1"
seta r_postProcess "1"
seta r_floatLightmap "0"
seta r_hdr "1"
seta r_greyscale "0"
seta r_stereoEnabled "0"
seta r_subdivisions "4"
seta r_vertexLight "0"
seta r_simpleMipMaps "1"
seta r_pixelAspect "1"
seta r_height "720"
seta r_width "1280"
seta r_noborder "0"
seta r_fullscreen "0"
seta r_mode "-2"
seta r_ignorehwgamma "0"
seta r_overBrightBits "1"
seta r_ext_multisample "0"
seta r_depthbits "0"
seta r_stencilbits "0"
seta r_alphabits "1"
seta r_colorbits "0"
seta r_texturebits "32"
seta r_detailtextures "1"
seta r_roundImagesDown "1"
seta r_picmip "0"
seta r_ext_max_anisotropy "2"
seta r_ext_texture_filter_anisotropic "0"
seta r_ext_direct_state_access "1"
seta r_arb_vertex_array_object "1"
seta r_arb_seamless_cube_map "0"
seta r_ext_framebuffer_multisample "0"
seta r_ext_texture_float "1"
seta r_ext_framebuffer_object "1"
seta r_ext_texture_env_add "1"
seta r_ext_compiled_vertex_array "1"
seta r_ext_multitexture "1"
seta r_ext_compressed_textures "0"
seta r_allowExtensions "1"