* Sanitize main unit from unused variables
* Move global variables to public scope
* Bring public vars into some reasonable order
* Move constants to const.inc, unless dependent from some used VCL unit
a) some hundred lines of code from childwin.pas to main.pas
b) redundant hints/captions/shortcuts/events for similar buttons/menuitems to their corresponding TAction in main.dfm .
This change
a) avoids several inconsistent captions like described in issue #595
b) makes it easier to have toolbars on the mainform which are controlled by childform.
- Remove the "Donate" button and add a more eye catching "Make donation by Paypal" logo below the MySQL logo
- Rename "Support forum" to what it is: a "User to user forum"
- Add a "Check for updates..." button right besides the version infos which basically calls the updatecheck dialog.
Implements a simple dialog which tells the user if there is some new release or nightly build available. Parses http://www.heidisql.com/updatecheck.php as a .ini file. Download buttons just start the webbrowser currently.
Todo: Automatic invocation of this dialog at regular intervals (for example once a week)
Todo: Automatic download + update + restart
