Update documentation for menu operations to include absolute value in signal processing

Author: PierreRaybaut

doc/features/signal/menu_operations.rst

@@ -106,8 +106,8 @@ Create a new signal which is the result of a constant operation on each selected
     :height: 24px
     :class: dark-light no-scaled-link
 
-Real and imaginary parts
-------------------------
+Absolute value, real and imaginary parts
+----------------------------------------
 
 .. list-table::
     :header-rows: 1

doc/locale/fr/LC_MESSAGES/features/signal/menu_operations.po

@@ -200,8 +200,8 @@ msgid ":math:`y_{k} = \\dfrac{y_{k-1}}{c}`"
 msgstr ""
 
 #: ../../doc/features/signal/menu_operations.rst:101
-msgid "Real and imaginary parts"
-msgstr "Parties réelle et imaginaire"
+msgid "Absolute value, real and imaginary parts"
+msgstr "Valeur absolue, parties réelle et imaginaire"
 
 #: ../../doc/features/signal/menu_operations.rst:109
 msgid "|abs| Absolute value"