4.5b1 triple-click selection glitch

[Ben Rosenthal]

While reading your release notes, I tested the new "triple-click 
selects line" functionality. There is a bug as follows:

- triple-click a line that is the only line in a paragraph and the next 
two lines are selected together, regardless of paragraph structure
- triple-click a line that precedes one or more lines in a single 
paragraph and the remaining lines in the paragraph will be selected 
individually when mousing down; the next two lines, after the paragraph 
ends, will be selected as a pair, regardless of paragraph structure

- Ben Rosenthal