Add the option to disable the use of blue bold sans serif

Until fithesis3, the fithesis document templates used Palatino (TeX Gyre Pagella) as its font family. In fithesis3, I added the palatino (default) and nopalatino package options, which can be used to revert to the Latin modern typefaces. Since fithesis4, we:

1. Use Neue Haas (TeX Gyre Heros) as our sans serif font when the palatino package option is used. This is unintuitive and should have its own set of options, such as neuehaas (default) and noneuehaas. (Closed in !32 (merged))

2. Override the \bfseries command, so that it switches to sans serif font and MUNI blue. At the very least, there should be an option to disable this behavior, such as sansbold (default) and nosansbold, and colorbold (default) and nocolorbold. (Closed in !31 (merged), !33 (merged), and !34 (merged))

Futhermore, we should consider a change of defaults:

3. The printed package macrooption should trigger the nocolorbold option, so that the printed version of a thesis never automatically uses blue for bold text even if the user enables the color option unless they also explicitly enable the colorbold option. This is because printing a thesis with many colored pages is costly and should be a conscious choice on the part of the student.

4. The example document for FI MU should use the nosansbold and nocolorbold options.