[PV][refact] Update filter interface

Goal

The filter interface was too complex and the actions of the button was not explicit enough.

This MR refactors the buttons and fixes a bug in ClearMaps. The maps couldn't be built once the button had been clicked.

It also improves the behavior of the decay threshold.

Changes

• Update default output (remove current keypoints and decrease the refresh rate) to improve performances
• Fix minor consistency issues in parameters
• Move buttons to their corresponding parameter section and rename them with more explicit names.
• Fix ClearMaps button

Results

Filter UI :

Checklist

• Camel case everywhere except for ROS variables/parameters
• Lower case for local variables and lambda functions
• Upper case for members, methods and tool functions (in Utils)
• Precise namespace when calling a function (or this->X or classe.X)
• Align code (for multiline if and while, "&&" or "||" go in upper line to ensure alignement)
• Check your spaces
  • between if, while, for and parenthesis
  • between operators and variables: e.g. a + b
  • after ","
• Mind your commit titles/desc (plurals, he/she + "s", correct tags, title should begin by a verb...)
• Function names should start with a verb, variable names should start with a name
• Macros should be between {}
• Do not use negative boolean (i.e. noJoe)
• Check minimal size of the types (double -> float -> int -> uint)
• Check const and ref in functions arguments
• References should be written "type& name", not "type &name"
• Update documentation
• Add MR labels [ROS]/[ROS2]/[PV]
• If ros/ros2, update task table here
• Add a comment over each non trivial function in header files
• Add a header to each new file