Unify progress data

[qarmin]

• Unify receivers/senders data from core to gui about progress
• Unify functions to create tree views
• Fix problem with invalid sorting of columns in bad extension tool
• Speedup folder/file search by avoiding using too big number of atomic writes
• Added ability to set number of threads in CLI

[qarmin]

Looks that on i7 4770 (4/8) and cheap ssd, finding files and reading its metadata is quite optimal with 8 threads(by default this is equal to number of threads)

Benchmark 1: target/release/czkawka_cli big -d /home/rafal -T 1
  Time (mean ± σ):      8.067 s ±  0.119 s    [User: 3.341 s, System: 4.693 s]
  Range (min … max):    7.973 s …  8.260 s    5 runs
 
Benchmark 2: target/release/czkawka_cli big -d /home/rafal -T 2
  Time (mean ± σ):      4.773 s ±  0.034 s    [User: 3.445 s, System: 4.622 s]
  Range (min … max):    4.731 s …  4.808 s    5 runs
 
Benchmark 3: target/release/czkawka_cli big -d /home/rafal -T 3
  Time (mean ± σ):      4.040 s ±  0.028 s    [User: 3.530 s, System: 5.084 s]
  Range (min … max):    4.008 s …  4.070 s    5 runs
 
Benchmark 4: target/release/czkawka_cli big -d /home/rafal -T 4
  Time (mean ± σ):      3.754 s ±  0.055 s    [User: 3.804 s, System: 5.646 s]
  Range (min … max):    3.677 s …  3.817 s    5 runs
 
Benchmark 5: target/release/czkawka_cli big -d /home/rafal -T 5
  Time (mean ± σ):      3.464 s ±  0.167 s    [User: 4.092 s, System: 5.997 s]
  Range (min … max):    3.167 s …  3.562 s    5 runs
 
Benchmark 6: target/release/czkawka_cli big -d /home/rafal -T 6
  Time (mean ± σ):      3.343 s ±  0.133 s    [User: 4.038 s, System: 6.396 s]
  Range (min … max):    3.113 s …  3.454 s    5 runs
 
Benchmark 7: target/release/czkawka_cli big -d /home/rafal -T 7
  Time (mean ± σ):      3.378 s ±  0.135 s    [User: 4.269 s, System: 6.498 s]
  Range (min … max):    3.265 s …  3.600 s    5 runs
 
Benchmark 8: target/release/czkawka_cli big -d /home/rafal -T 8
  Time (mean ± σ):      2.691 s ±  0.168 s    [User: 4.245 s, System: 6.840 s]
  Range (min … max):    2.595 s …  2.984 s    5 runs
 
Benchmark 9: target/release/czkawka_cli big -d /home/rafal -T 9
  Time (mean ± σ):      2.798 s ±  0.012 s    [User: 4.188 s, System: 6.735 s]
  Range (min … max):    2.781 s …  2.809 s    5 runs
 
Benchmark 10: target/release/czkawka_cli big -d /home/rafal -T 10
  Time (mean ± σ):      2.817 s ±  0.026 s    [User: 4.149 s, System: 6.747 s]
  Range (min … max):    2.795 s …  2.849 s    5 runs
 
Benchmark 11: target/release/czkawka_cli big -d /home/rafal -T 11
  Time (mean ± σ):      2.812 s ±  0.020 s    [User: 4.136 s, System: 6.789 s]
  Range (min … max):    2.788 s …  2.841 s    5 runs
 
Benchmark 12: target/release/czkawka_cli big -d /home/rafal -T 12
  Time (mean ± σ):      2.825 s ±  0.015 s    [User: 4.118 s, System: 6.837 s]
  Range (min … max):    2.808 s …  2.839 s    5 runs