Stunner - Update Tooltip message for Priority property in Task

Sets the priority of the Task.<br>\
  It allows integer values, but also expressions. Expressions can be used in order to evaluate the integer value dynamically, instead of using some fixed number. <br>\
  For instance, the priority can be set as just 25, or use the expression #{var} in order to set the value from evaluating the variable "var".

Sets the priority of the Task.<br>\
It allows integer values and expressions. You can use the expressions to evaluate the integer value dynamically, instead of using a fixed number.<br>\
For an instance, you can set the priority to 25, or an expression as #{var} where the "var" variable contains a number.