Initial form monitor commit.

Adds code to check if a form has been modified to activate submission buttons

<md:form> includes the class "monitored-form" by default.
Form submit buttons need to have the class "active-on-change" to be affected

So far, only forms in metridoc-rid: ridTransaction/create and metridoc-core: manageReport/_manageReportIndex have been configured.

Other forms will be done in separate commits to avoid really large commits.

#30
Add monitored forms for metridoc-core

Buttons using the button template must include buttonClass:"active-on-change" to be monitored.

#30
Add monitored forms for metridoc-rid

#30
Remove option to turn off monitoring since it is unnecessary

#30
Merge pull request #111 from metridoc/add_form_monitor

Add form monitor