Rename checkbox and immediately apply.
Added a checkbox in Location selection dialog (saved as user settings) to let user choose if variable is being renamed.
Also forced closing celle editor once new location is selected.

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                  <xsd:element name="Linux">

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                    <xsd:complexType>

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                      %(toolchain_gcc)s

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                    </xsd:complexType>

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                  </xsd:element>