GitLab

The m_page member used to access the widgets was deleted too early.
Deletion moved to finish() method.

Task:     -
RevBy:    -
AutoTest: -
Details:  -

The previous interface wasn't sufficient to properly support the Apply
button, since it didn't separate applying the changes from the cleanup
phase.

Designer settings pages still need some fixing.

Fixes Apply button causing problems for certain plugins, for example the
QuickOpen.

Reviewed-by: mae

It is now possible to choose between case-sensitive or case-insensitive
completion. Also, you can now disable the automatic insertion of braces.