Problems with searching using regular expressions

Hello, Neil,
I found a few problems with regular expression searches in Scite when I was 
trying to quickly bookmark and remove all the blank lines in a file. 
(There's nothing special about the file, but I've attached it for 
convenience.) I am talking about the following expressions: empty and blank 
lines - ^$ ,^\s*$ and just demos: ^.*$ , ,$ , ^
Here are the facts found.
1. Applies to Scite starting from 4.05.

   - " Find Next" does not work with ^$ , ^.*$ , $ , ^ after the first 
   found occurrence.
   -  With ^\s*$ "Find Next" works for blank lines, but stops at the empty 
   line (*$). See attached screenshot 1. Find Next stopped on line 3.
   -  For all the expressions mentioned, Scite can "Bookmark All", however 
   there is another problem mentioned in item 3.

2. Applies to Scite older than 4.05. "Find Next" works well with all of the 
expressions above except ^. Here, "Find Next" works on empty strings (^$), 
but does not work after non-empty strings.
3. Affects any version of Scite, problem with "Bookmark All" using one of 
the expressions above. Scite does not bookmark all the required lines. See 
attached screenshots 2 and 3. (My intention was to bookmark all empty lines 
using ^$ in the attached file.) The behaviour is strange. For example, when 
we scroll to the bottom of an attached file and call "bookmark all" with 
^$, the top lines will not be marked. The number of lines with bookmarks 
depends on the scroll position when calling “Bookmark All”. (It is possible 
to bookmark all the lines. We need to scroll through the file and use the 
command again and again. But this requires a lot of attention.)
I don't thing this issue is a priority. There are often many other editors 
around. But I use SciTE on remote servers where the software installation 
policy is very strict. Then I only have Scite.
I've never looked into Scite's implementation of regular expressions. 
Before looking, I would like to check with you.
Thanks,
 Yury

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