Follow-up to #6472. Improve UI/UX. JIRA issue: CORE-19363 - Improve English text in resource. - Reduce earth.ico icon file size.
Supporting Language Bar... JIRA issue: CORE-19363 - Add CTrayIconWnd, CMainIconItem, and CButtonIconItem classes. - Modify msctf.spec for TF_GetLangIcon function. - Add main icon IDI_MAINICON ("res/earth.ico").