Improve rendering of find matches touching each other

Issue Type: <b>Bug</b> I need to remove some lines of text from about 80 files (every file has about 2000 rows) at the same time. I wanted to use search&replace tool in vs Code(ctrl+shift+f). And my issue consists of two different problems: ## Problem 1 Given following rows: ``` být=elektronický=zásilka být=jiný=způsob být=poskytování=pozáruční být=poskytování=servisní být=pozdě=třetí být=pozáruční být=pozáruční=servis být=příslušný=krajský být=příslušný=poškozený být=schopný=dodaný být=servis být=servisní být=servisní=služba být=služba=zahrnující být=zejména=uvedený ``` where I need to remove whole row with occurence. This works correctly and matches 3+grams: `^být=[^=]+=.*` This incorrectly matches also 2grams: `^být=[^=]+=.*\n` Then i thought - ok, I can make some workaround and split it to two regexps which lead to problem 2. ## Problem 2 When I removed all occurences of this `^být=[^=]+=.*` from all files, then I needed to remove blank lines. I used the same tool for multi search and replace in all files from the same folder. I used this regexp `^\n` and the button for replace all (it said about 2000 occurences) didn't do almost anything (changed about 3 files from 80). Ok I tried to click to replace all button in multisearch window file by file. Reached 3rd file where it stopped to work as well. Ok if I click fast enough I might be done soon I thought and clicked on replace for each occurence in multisearch window. And I was terrified when I later found that it instead of deleting blank lines also deleted lines with text. (e.g. `cena=náhradní=díl`) VS Code version: Code 1.44.1 (a9f8623ec050e5f0b44cc8ce8204a1455884749f, 2020-04-11T01:48:12.622Z) OS version: Windows_NT x64 10.0.18363 <details> <summary>System Info</summary> |Item|Value| |---|---| |CPUs|Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz (8 x 2808)| |GPU Status|2d_canvas: enabled<br>flash_3d: enabled<br>flash_stage3d: enabled<br>flash_stage3d_baseline: enabled<br>gpu_compositing: enabled<br>multipl…