cleanup three display and fix #3517 & #3503

[SimonDanisch]

Closes #3517. The issue was two fold, and both about not correctly re-using the WGLMakie.Screen.
Took the chance to clean up the old ThreeDisplay which didn't make much sense anymore.

[MakieBot]

Compile Times benchmark

Note, that these numbers may fluctuate on the CI servers, so take them with a grain of salt. All benchmark results are based on the mean time and negative percent mean faster than the base branch. Note, that GLMakie + WGLMakie run on an emulated GPU, so the runtime benchmark is much slower. Results are from running:

using_time = @ctime using Backend
# Compile time
create_time = @ctime fig = scatter(1:4; color=1:4, colormap=:turbo, markersize=20, visible=true)
display_time = @ctime Makie.colorbuffer(display(fig))
# Runtime
create_time = @benchmark fig = scatter(1:4; color=1:4, colormap=:turbo, markersize=20, visible=true)
display_time = @benchmark Makie.colorbuffer(fig)

	using	create	display	create	display
GLMakie	3.60s (3.49, 3.70) 0.07+-	415.49ms (401.07, 429.39) 10.01+-	503.61ms (492.77, 522.63) 9.84+-	7.59ms (7.33, 7.70) 0.14+-	26.20ms (25.87, 26.40) 0.22+-
master	3.60s (3.53, 3.70) 0.06+-	412.91ms (396.60, 430.70) 12.01+-	495.49ms (484.22, 518.57) 11.61+-	7.57ms (7.48, 7.67) 0.06+-	26.18ms (26.05, 26.29) 0.09+-
evaluation	1.00x invariant, 0.01s (0.13d, 0.81p, 0.06std)	0.99x invariant, 2.58ms (0.23d, 0.67p, 11.01std)	0.98x invariant, 8.12ms (0.75d, 0.18p, 10.72std)	1.00x invariant, 0.01ms (0.13d, 0.81p, 0.10std)	1.00x invariant, 0.02ms (0.09d, 0.87p, 0.15std)
CairoMakie	3.02s (3.00, 3.09) 0.03+-	318.39ms (315.36, 319.96) 1.72+-	141.05ms (139.91, 144.78) 1.70+-	7.14ms (7.08, 7.22) 0.05+-	604.99μs (599.32, 616.46) 5.43+-
master	3.02s (3.01, 3.08) 0.02+-	318.47ms (314.61, 321.61) 2.11+-	140.35ms (138.50, 142.03) 1.09+-	7.19ms (7.04, 7.29) 0.08+-	604.65μs (598.35, 614.08) 5.06+-
evaluation	1.00x invariant, -0.0s (-0.00d, 0.99p, 0.03std)	1.00x invariant, -0.08ms (-0.04d, 0.94p, 1.92std)	1.00x invariant, 0.7ms (0.49d, 0.38p, 1.40std)	1.01x invariant, -0.05ms (-0.73d, 0.20p, 0.07std)	1.00x invariant, 0.35μs (0.07d, 0.90p, 5.25std)
WGLMakie	3.71s (3.67, 3.81) 0.05+-	455.96ms (325.87, 554.98) 117.93+-	9.17s (9.01, 9.45) 0.15+-	9.30ms (9.08, 9.68) 0.20+-	71.69ms (67.89, 79.65) 5.38+-
master	3.75s (3.69, 3.85) 0.06+-	330.63ms (322.79, 333.85) 3.75+-	9.21s (9.08, 9.37) 0.10+-	9.23ms (9.10, 9.45) 0.11+-	71.41ms (67.11, 77.04) 4.09+-
evaluation	1.01x invariant, -0.04s (-0.77d, 0.17p, 0.05std)	0.73x slower❌, 125.33ms (1.50d, 0.03p, 60.84std)	1.00x invariant, -0.04s (-0.34d, 0.54p, 0.12std)	0.99x invariant, 0.07ms (0.46d, 0.41p, 0.16std)	1.00x invariant, 0.28ms (0.06d, 0.91p, 4.74std)