cheminfo/nmrium: nmrium v0.21.0

Features clear zoom history when pressing the "f" key (fc1e457), closes #1399 hide multiple spectra auto range picking when ranges picking tool not active (1690c82), closes #1396 hide zones picking and slicing tool in exercise workspace (c1f2c5d) save NMRium preferences by workspace (#1393) (83ddbc5) show only spectra and integral panels in exercise workspace (43b6c65), closes #1395 Bug Fixes manual option of changing an integral sum not selected in the exercise mode (70640e9), closes #1397 Processed file can not be loaded on dev.nmrium.org (0a51dd5), closes #1316 select tool by pressing its shortcut when no spectrum is selected (61bd971), closes #1373 zoom history in 2D (c2c989a), closes #137