[Reg 16.0 > 17.0] TextEditor marks to end of previous block

Steps to reproduce:

• have some indented text (or just whitespaces on a line)
• jump to start of the line (first "real" character) or end of the line (if only ws in this line)
• Ctrl+Shift+Left

Expected:

• editor marks to the beginning of the current block

Current:

• editor marks to the end of the previous block