[FIX] Compatibility with Logitech's Smart Move

[thocevar]

Issue

Fixes #3294, #3598

Description of changes

Logitech's Smart Move option moves the mouse pointer to a focused item after opening a new window.

A double-click triggers two mouse press events and a double-click event between them. After the widget window opens, Smart Move triggers a mouse move event. A typical event sequence is [press, release, double click, press, move, release], which results in a relocation of the widget's node on canvas (moved while pressed).

The solution is to ignore the second press event if it is too close (closer than doubleClickInterval) to the previous one.

Includes

• Code changes
• Tests
• Documentation

[codecov]

Codecov Report

Merging #3702 into master will increase coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3702      +/-   ##
==========================================
+ Coverage   84.52%   84.52%   +<.01%     
==========================================
  Files         373      373              
  Lines       68391    68391              
==========================================
+ Hits        57805    57806       +1     
+ Misses      10586    10585       -1