Revert "Move "setlocal hlsearch" to Highlight() function"

This reverts commit 4d1382e99a6236aeff9fd885a2981a93117ad5b1.

The mappings didn't work as before for some unknown reason.
Use font of size 10 on Windows

The relationship of font size and actual size of a characters is not
linear, so font of size 11 look really huge.
Don't reset cursor position when editing gitcommit

Otherwise one needs to go to the top of a file manually just after it's
opened.