Cannot change case of a column name #985

Details for the issue

When I have this table

and try to change name A to a, it says There already is a field with that name. Please rename it first or choose a different name for this field.:

However if I enter A it proceeds fine.

Useful extra information

I'm opening this issue because:

• DB4S is crashing
• DB4S has a bug
• DB4S needs a feature
• DB4S has another problem

I'm using DB4S on:

• Windows: ( version: ___ )
• Linux: ( _distro: Xubuntu 14.04.5 LTS trusty)
• Mac OS: ( version: ___ )
• Other: ___

I'm using DB4S version:

• 3.9.1
• 3.9.0
• Other: 43a5175

I have also:

• Tried out the nightly version: https://github.com/sqlitebrowser/sqlitebrowser#windows
• Searched for an existing similar issue: https://github.com/sqlitebrowser/sqlitebrowser/issues?utf8=%E2%9C%93&q=is%3Aissue%20