Add place layer options

[BillPascoe]

Under the heading for 'Add a place to TLCMap' it says "First. choose a layer. Every place in TLCMap belongs to a layer. You can add more places to this layer later." Change it to, "Places in TLCMap are part of a map layer. Choose a layer or create a new layer to add this place to it. You can edit the layer details later."

Replace the current layer drop down and button with:

• A text box with a button saying 'New Layer'.
• A drop down list with all the user's layers. If the user has no layers, it is automatically populated with a "'s Layer".
• If the user types in the box and clicks the 'New layer' button, it adds this layer name to the list of layers in the drop down and it is selected.
• When user clicks 'Save', if the selected layer doesn't already exist, create it. Add the place to selected layer. (Normally Description field is required for a layer. Remove this requirement, so a new layer only requires a title.)

Alternatively, if this is too much effort, we could do this which requires less change but isn't as good:

• The button says 'Edit layer' but it doesn't edit a layer, it goes to the Add Layer Screen. Make the button say 'New layer'. It should open in a new tab.

[IanMcCrabb]

Lets do the 2nd option straight away.

[IanMcCrabb]

@MufengNiu I think we just need to make the button say New Layer not Edit Layer

[IanMcCrabb]

OK