Fix cookbook warnings and formatting

Summary

Follow-up to !316 (merged)

Fix a few warnings and improve rendering of some applications documentation. Also make sure ram parameter is third from last.

Rationale

More beautiful cookbook!

Copyright

The copyright owner is CNES and has signed the ORFEO ToolBox Contributor License Agreement.

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Check before merging:

• All discussions are resolved
• At least 2 votes from core developers, no vote.
• The feature branch is (reasonably) up-to-date with the base branch
• Dashboard is green
• Copyright owner has signed the ORFEO ToolBox Contributor License Agreement

Modules/Applications/AppImageUtils/app/otbRescale.cxx

@@ -69,8 +69,6 @@ private:
     AddParameter(ParameterType_OutputImage, "out",  "Output Image");
     SetParameterDescription( "out" , "The rescaled image filename." );
 
-    AddRAMParameter();
-
     AddParameter(ParameterType_Float,      "outmin", "Output min value");
     AddParameter(ParameterType_Float,      "outmax", "Output max value");
     SetDefaultParameterFloat("outmin", 0.0);
@@ -81,6 +79,8 @@ private:
     MandatoryOff("outmin");
     MandatoryOff("outmax");
 
+    AddRAMParameter();
+
     // Doc example parameter settings
     SetDocExampleParameterValue("in", "QB_Toulouse_Ortho_PAN.tif");
     SetDocExampleParameterValue("out", "rescaledImage.png uchar");