Fix some smaller issues

[PeterBlenessy]

Update the application to address several smaller issues.

• Dark Mode: Set dark mode to true in src/main.js by changing the Quasar config.
• Fetch Issues: Remove http:// from the URL in the jiraFetch, searchIssues, and getIssueDetails functions in src/services/jira.js.
• Scrollbars: Make scrollbars hidden only in App.vue by changing the <style> tag to <style scoped>.
• Table Height: Update the height of the table in src/components/JqlSearch.vue to height: calc(100vh - 155px) in the .my-sticky-header-table class.
• Card Element Height: Set the height of the card element in src/components/JqlSearch.vue to full height with style="height: 100%; width: 100vw".

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