#3699 Exact search in "Find text on server" dialog

[J.Villafruela]

In the text search on the server function the search is performed using column LIKE '%%'.
It would be useful to have an option to search an exact match of the string entered in the "text to find" field.

GUI suggestion :
- add a checkbox "Exact match" next to "Case sensitive" checkbox.
OR
- add a dropdown list with the elements :
Contains text = > column LIKE '%%'
Begins with text => column LIKE '%'
Ends with text => *column LIKE '%<text to find%' *

Hide the checkcbox/list when searching for numeric values (see [#3350] )