Centralize physical template detection code

In-Portal has 2 types of templates:

• physical - each url matches 1 TPL file in theme;
• virtual - multiple urls matches same TPL in theme.

For example TPL "/platform/my_account/my_profile.tpl" will have "/my-account/my-profile.html" url.

If you place <inp2:m_if check="m_IsActive" template="platform/my_account/my_profile"> ACTIVE </inp2:m_if> code in that template you'll see nothing since tag m_IsActive can't handle this.