PlatSim-related launch wizard changes: (1) Remember last connection created and offer this by default in the Select Connection dialog; (2) Immediately open New Connection dialog if debugging and no connections exist; (3) Split out SelectConnectionDialog; (4) Fix some wording in Select Connection dialog since this is not always an error situation.

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<!-- START_USECASES: CU2 END_USECASES -->
<!DOCTYPE template [
<!ENTITY template_add SYSTEM "../shared/template_add.inc">
]>
<template 
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	&template_add;

</template>