Medium changes: Addition of 1) "Special Warning" regarding the use of the double-click; 2) Tabs-window for jackknife plots when small screen

Addition of a "Special Warning" regarding the use of the double-click
Addition of the display of a Tabs-window for jackknife plots when small screen, in addition to the single multi-graph windows.
Increase in the size of characters tables Statistics and Correlation and change in the title (Rank Correlation) of the latter table.
Additional removal of the double naming of the jackknife R² (Global.r_jk instead of Global.jackknife).
File Configuration.java deleted (no more used, replaced by code in CadreMain.java, lines starting from 918 private void readConfig().
Minor changes on the display of message text.