+3.3.1. Edit platform by entering empty name
+-------------------------------------------
+- double click a platform name
+> The name field in the first row is activated for editing
+- clear all the characters from name, press enter
+> The input was not accepted
+ > a message was shown telling that empty name is not accepted
+ > The original name is restored
+
+3.3.1. Edit platform by entering name with spaces only
+-------------------------------------------------------
+- double click a platform name
+> The name field in the first row is activated for editing
+- clear all the characters from name and enter an empty space for the name, press enter
+> The input was not accepted
+ > a message was shown telling that empty name is not accepted
+ > The original name is restored
+
+3.3.1. Edit platform by entering an equal name to existing name
+---------------------------------------------------------------
+- double click a platform name
+> The name field in the first row is activated for editing
+- Change the name to match an existing name in another row, press enter
+> The input was not accepted
+ > a message was shown telling that the name already exists
+ > The original name is restored
+
+3.4. Delete platform