Preview translations (#12503)

Updated new preview options missing
+ Ru improvements (thanks @valerii-bokhan )

localization/i18n/nl/OrcaSlicer_nl.po

@@ -4559,7 +4559,7 @@ msgid "Line Width"
 msgstr "Lijn dikte"
 
 msgid "Actual Speed"
-msgstr ""
+msgstr "Werkelijke snelheid"
 
 msgid "Fan Speed"
 msgstr "Ventilator snelheid"
@@ -4568,7 +4568,7 @@ msgid "Flow"
 msgstr "Flow"
 
 msgid "Actual Flow"
-msgstr ""
+msgstr "Werkelijke stroom"
 
 msgid "Tool"
 msgstr "Hulpmiddel"
@@ -4703,7 +4703,7 @@ msgid "Color: "
 msgstr ""
 
 msgid "Actual Speed: "
-msgstr ""
+msgstr "Werkelijke snelheid: "
 
 msgid "Statistics of All Plates"
 msgstr ""
@@ -4817,7 +4817,7 @@ msgid "Speed (mm/s)"
 msgstr "Snelheid (mm/s)"
 
 msgid "Actual Speed (mm/s)"
-msgstr ""
+msgstr "Werkelijke snelheid (mm/s)"
 
 msgid "Fan Speed (%)"
 msgstr "Ventilator snelheid (%)"