* Introduce TAppSettings, created in dpr file
* Implement read and write methods, and replace callers of GetRegValue and MainReg.WriteInt/... with these
* Optimize read and write methods for avoiding redundant accesses to registry
* Auto-remove stored default settings from registry to avoid registry spam
* Replace synced MainForm.pref* variables with TAppSettings.Read* calls
* Move SetLocales call to dpr file
* Move MainForm.FDirname* variables to appropriate methods in helpers.pas
* Implement TQueryHistory.Create(SessionPath), reading its items within constructor
- Move QuoteIdent() and DeQuoteIdent() out of TMySQLConnection, make them classless
- Remove TMainForm.mask(), instead always use QuoteIdent()
- Introduce a third parameter to QuoteIdent(): "AlwaysQuote" - setting this to false will quote only if required
- Set AlwaysQuote to false for all stuff which drops some code into the query editor, see http://www.heidisql.com/forum.php?t=6986
* Remove workaround for Unicode text to and from clipboard
* Fix writing/reading wrong encoded text into/from registry - no need to use Utf8Encode() any longer
* Implement TMySQLQuery.ColAsAnsi() for cases in which we read binary data.
* Instead, use separate SHOW commands for tables, functions, procedures and triggers
* Catch this chance to move these methods from main unit to mysql_connection, so they're accessible in a more generic way
* Additionally, introduce new classes TDBObject and TDBObjectList which provide a more generic way than TMySQLQuery to access these database objects.
Fixes issue #1529
* Make sure the INSERT query is fired within a try/except block, and keep form open on any error
* Reasonably rename some component names
* Remove InsertFilesWindow(), instead cache the instance of InsertFiles in main form, like it is for most other dialogs
* Get rid of a with .. do block
* Ger rid of a weird form pointer, instead use the "Owner" property
- FetchDbTableList now makes use of various tables in INFORMATION_SCHEMA if available - the only way of listing stored routines.
- If a routine is selected, Table + Data tab hide their grids and display a corresponding message instead. Seemed the only way to keep the normal flow of clicks, not changing too much click logic.
- Fixes bug #271 "F5 shortcut in database tree not working"
- Fullfills rfe #519 "Highlight selected item in tree view when focus is elsewhere"
- Fixes inconsistent expansion state of nodes after refreshing
- Fixes plus sign staying when a db node with 0 tables was selected
- Slightly enhances painting speed within the dbtree
- Removes temporary storage of a rightclicked node (DBRightClickSelectItem). VirtualTree handles its right clicked selection exactly like the left clicked one, which makes makes coding a bit cleaner as we can always use the selected item instead of hacking with the right and left clicked node. On the other side it removes a quite user friendly feature. Well, we can reimplement this feature later, though it's not user UNfriendly currently.
- Reasonably rename the StringList "OnlyDBs" to "DatabasesWanted" and "OnlyDBs2" to "Databases"
