The timezone conflict dialog allows the user to either:

• change the profile timezone setting to match the browser timezone
• ignore the conflict

However, the submit button was explicitly labeled "Change Timezone", which is innacurate if the user picks the "Ignore Conflict" option from the dropdown menu.

This patch changes the label of the submit button to "Submit", so that it works for both ignoring the conflict and setting a new profile timezone.

• Change your browser/system timezone to differ from your Phorge profile timezone
• Click the notice that Phorge shows at the bottom left about the timezone mismatch
• Confirm that the submit button now says "Submit" instead of "Change Timezone"