Use 3d text actors by default

[akaszynski]

Resolve #3908 by using 3d text actors by default.

This also has the side effect of improving the smoothness of the fonts and improving the overall quality of the text actors.

import pyvista as pv
pv.set_plot_theme('document')
mesh = pv.Sphere()
pl = pv.Plotter(shape=(1, 2))
pl.add_mesh(mesh)
pl.add_text('use_3d_text=False')
pl.show_bounds(
    grid='front',
    location='outer',
    all_edges=True,
    use_3d_text=False,
    bold=False,
    font_size=16,
)
pl.subplot(0, 1)
pl.add_mesh(mesh)
pl.add_text('use_3d_text=True')
pl.show_bounds(
    grid='front',
    location='outer',
    bold=False,
    all_edges=True,
    font_size=16,
    use_3d_text=True,
)

pl.show()

[codecov]

Codecov Report

Merging #3910 (69a4889) into main (8698af5) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #3910      +/-   ##
==========================================
+ Coverage   94.20%   94.21%   +0.01%     
==========================================
  Files          91       91              
  Lines       19625    19697      +72     
==========================================
+ Hits        18487    18558      +71     
- Misses       1138     1139       +1     

[banesullivan]

LGTM! Agree with the default change since set_scale() is plagued with other issues and should justify a poorer default choice